# How to change the citation style for one citation

for my bachelor thesis I want to improve my work with a citation in the beginning. How could I do this to make it look like this

EDIT 1 : MWE

Okay this is a MWE which hopefully helps to answear the question. The MWE reference should be look like the one in the image.

\documentclass[12pt,a4paper,onecolumn,oneside,draft=on]{article}
\usepackage[left=4cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\usepackage[onehalfspacing]{setspace}
\usepackage[english,ngerman]{babel}
\usepackage[T1]{fontenc}
\usepackage[ansinew]{inputenc}
\usepackage{titlesec}
\usepackage[nottoc]{tocbibind}
\usepackage{graphicx}
\usepackage{amsmath}
\usepackage{float}
\usepackage[backend=biber,bibencoding=utf8,natbib=true,style=apa]{biblatex}
\usepackage{subcaption}
\usepackage{pdfpages}

\newtheorem{theorem}{Theorem}
\newtheorem{acknowledgement}[theorem]{Acknowledgement}
\newtheorem{algorithm}[theorem]{Algorithm}
\newtheorem{case}[theorem]{Case}
\newtheorem{claim}[theorem]{Claim}
\newtheorem{conclusion}[theorem]{Conclusion}
\newtheorem{condition}[theorem]{Condition}
\newtheorem{conjecture}[theorem]{Conjecture}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{criterion}[theorem]{Criterion}
\newtheorem{definition}[theorem]{Definition}
\newtheorem{example}[theorem]{Example}
\newtheorem{exercise}[theorem]{Exercise}
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{notation}[theorem]{Notation}
\newtheorem{problem}[theorem]{Problem}
\newtheorem{proposition}[theorem]{Proposition}
\newtheorem{remark}[theorem]{Remark}
\newtheorem{solution}[theorem]{Solution}
\newtheorem{summary}[theorem]{Summary}
\newenvironment{proof}[1][Proof]{\noindent\textbf{#1.} }{\ \rule{0.5em}    {0.5em}}
\makeatletter
\def\@biblabel#1{\hspace*{-\labelsep}}
\makeatother
\makeatletter
\renewcommand{\@cite}[1]{#1}
\makeatother
\setlength{\parindent}{0 cm}
\setlength{\parskip}{6 pt}
\setcounter{tocdepth}{100}
\begin{document}
"This is a famous reference and should be higlighted as in the picture of this post."  \citet{Mokyr1999}

\printbibliography[ title={7 References}]

\end{document}


EDIT 2 : Bibtex Entry for MWE

@InBook{Mokyr1999,
chapter   = {The New Economic History and the Industrial Revolution.},
pages     = {1--127},
title     = {The British Industrial Revolution: An Economic Perspective},
publisher = {Boulder: Westview.},
year      = {1999},
author    = {Mokyr, Joel},
editor    = {Mokyr, Joel},
edition   = {2nd. ed.},
}

• I've taken the liberty of replacing the link with a screenshot. Feel free to revert. – Mico Jan 2 at 14:08
• Thanks for that and for the improvement of my english. – mugdi Jan 2 at 14:23
• Can you name the style your cite with? If you change values and you only want them to be changed for one part, you can put it in {brackets}. It will only be changed inside the brackets and reverted after them. Can you add a MWE (minimal working example)? – MaestroGlanz Jan 2 at 15:45
• I cite in APA. I will try to create a MWE and add it to the first post. – mugdi Jan 2 at 15:47
• Please don't link to external download sites for parts of the MWE. Instead just paste an example .bib entry in the question. – moewe Jan 2 at 16:09

This answer only focusses on the citation aspect of the desired output. For nice formatting of the quotation itself, have a look at "Inspirational" quote at start of chapter and the many linked questions.

It is not entirely clear to me what citations of entry types other than @inbook should look like here. I extrapolated, but this will need adjustments.

We simply define a new citation command called \fancyquotecite that you can use instead of the usual \cite, \textcite, etc. \fancyquotecite is fuelled by the bibliography macro fancyquotecite and prints the labelname (the primary name associated with the work/entry, usually the author or editor) and the titles.

\documentclass[12pt,a4paper,onecolumn,oneside]{article}
\usepackage[english,ngerman]{babel}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{csquotes}

\usepackage[backend=biber, style=apa]{biblatex}

\DeclareCiteCommand{\fancyquotecite}
{\usebibmacro{prenote}}
{\usebibmacro{citeindex}%
\usebibmacro{fancyquotecite}}
{\multicitedelim}
{\usebibmacro{postnote}}

\newbibmacro{fancyquotecite}{%
\printnames[given-family]{labelname}%
\printfield{maintitle}%
\printfield{booktitle}%
\printfield{title}%
}

\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@InBook{Mokyr1999,
title        = {The New Economic History and the Industrial Revolution},
pages        = {1--127},
booktitle    = {The British Industrial Revolution},
booksubtitle = {An Economic Perspective},
publisher    = {Westview},
location     = {Boulder},
year         = {1999},
author       = {Mokyr, Joel},
editor       = {Mokyr, Joel},
edition      = {2},
}
\end{filecontents}

Please note how I changed the contents of some fields in your .bib file to work better with biblatex. Note also that it is a bad idea to include the chapter number in the title to \printbibliography, use heading=bibnumbered instead.
• @mugdi Since you tagged this question with biblatex and citing and supplied the bibliography and citation MWE I only answered the part of getting the citation/citation call-out produced by \cite... or a similar command right. To format the quote itself have a look at the linked question tex.stackexchange.com/q/53377/35864 and ask a new question (not involving the citation part, which I answered) if you have trouble getting it to work. On this site it is better to have questions about one particular issue only and this issue is definitely split in citation and quotation. – moewe Jan 2 at 21:38