# Citation and reference list isn't working [duplicate]

I have issues with setting up citations in the text itself and creating a reference list. I used jabref to create citations and I saved the bib-data as Literatur.bib in the folder in which I have all other files. Shortended Code:

\documentclass[12pt]{article}

\usepackage[backend=biber,style=apa,babel=other]{biblatex}
\usepackage[babel,german=quotes]{csquotes}
\usepackage[locale=US]{siunitx}

\DeclareLanguageMapping{ngerman}{ngerman-apa}

\begin{document}
This is supposed to be a quote here \cite{Example2000}.
\newpage
\printbibliography
\end{document}


In text, the citation appears as Example2000 in bold letterings, not as supposed in (Example, 2000). A reference list is not set up.

Warnings:

'babel' option is deprecated, use 'autolang' instead. Citation 'Example2000' on page 4 undefined Empty bibliography There were undefined references. Please (re)run Biber on the file:(biblatex) Abschlussbericht(biblatex) and rerun LaTeX afterwards.

In the bib-data, the reference looks like:

@Article{Example2000,
Title                    = {Test},
Author                   = {Example, V.},
Journal                  = {Example magazine},
Year                     = {2000},
Pages                    = {33-37},
Volume                   = {8},
}


What am I doing wrong? :(

-

## marked as duplicate by moewe, Masroor, Malipivo, Andrew Swann, Christian HupferMay 9 '14 at 7:09

Did you run pdflatex, biber, pdflatex? – musicman May 6 '14 at 14:18
Yes, did not work – Jens May 8 '14 at 23:30
Possible duplicate of Biblatex with Biber: Configuring my editor to avoid undefined citations. (As per a comment by the user posted as an answer that has been removed since.) The clue is in the error message Please (re)run Biber on the file .... – moewe May 9 '14 at 5:11

Your problem is how you define your used languages. Looks like you're using depracted code. You didn't load the babel-package for example. Look at your updated MWE. Now it should work:

\documentclass[12pt,ngerman]{article}%mod.

\usepackage[backend=biber,style=apa]{biblatex}%mod.
\usepackage[german=quotes]{csquotes}%mod.
\usepackage[locale=US]{siunitx}

\DeclareLanguageMapping{ngerman}{ngerman-apa}

\usepackage{filecontents}%include your bib-file for testing purposes
\begin{filecontents}{Literatur.bib}
@Article{Example2000,
Title                    = {Test},
Author                   = {Example, V.},
Journal                  = {Example magazine},
Year                     = {2000},
Pages                    = {33-37},
Volume                   = {8},
}
\end{filecontents}