Adjustments to bibliography / no comma between author and year / no italic font

Question

I am actually quite happy with the apa style but I need some help to achieve the following two adjustments:

I do not want a comma between the author's name and the year. I don't want italic font at all. It appears for the title of books and for the name of the Journal for articles.

This is my current set up

\usepackage[style=apa]{biblatex}
\addbibresource{bibliography.bib}
\DeclareDelimFormat{nameyeardelim}{\space}

\newpage
\pagenumbering{Roman}
\setcounter{page}{3}
\renewcommand*{\mkbibnamefamily}[1]{\textsc{#1}}
\renewcommand*{\newunitpunct}{\addcomma\space}
\printbibliography 

Answer 1

As Alan Munn says in the comments: biblatex-apa is supposed to implement APA style as closely as possible with biblatex. It was not designed with (easy) customisability in mind.

Case in point: Usually you could get rid of the comma between name and year as easily as saying \DeclareDelimFormat[bib]{nameyeardelim}{\addspace}. But biblatex-apa doesn't use this delimiter and uses \newunit\newblock instead, so we need to make it use namyeardelim before we can use it to change the comma.

You can get rid of the italics by redefining the ...title field formats. See for some background Remove Quotation Marks from Style.

\documentclass[british]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{babel}
\usepackage{csquotes}

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


\renewcommand*{\newunitpunct}{\addcomma\space}

\renewcommand*{\mkbibnamefamily}[1]{\textsc{#1}}

\DeclareDelimFormat{nameyeardelim}{\addspace}
\DeclareDelimFormat[bib]{nameyeardelim}{\addspace}

\renewbibmacro*{author/editor}{%
  \ifthenelse{\ifnameundef{author}\AND\ifnameundef{groupauthor}}
    {\ifnameundef{editor}
      {\usebibmacro{title}%
        % need to clear all title fields so we don't get them again later
        \clearfield{title}%
       \clearfield{subtitle}%
       \clearfield{titleaddon}}
      {\usebibmacro{editorinauthpos}}}
    {\usebibmacro{author}}%
  \setunit{\printdelim{nameyeardelim}}%
  \usebibmacro{labelyear+extradate}}

\DeclareFieldFormat{title}{#1\isdot}
\makeatletter
\DeclareFieldFormat{origtitle}{\bbx@colon@search\MakeSentenceCase*{#1}\isdot}
\makeatother
\DeclareFieldFormat{journaltitle}{#1\isdot}
\DeclareFieldFormat{issuetitle}{#1}
\DeclareFieldFormat{maintitle}{#1}
\DeclareFieldFormat{booktitle}{#1}

\addbibresource{biblatex-examples.bib}

\begin{document}
\cite{sigfridsson,cicero,worman,westfahl:space,gaonkar:in}
\printbibliography
\end{document}