\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}  % allows UTF encoding, needed for Icelandic characters
% biblatex/biber citations
%% We set when etal is used in maxnames=XX
\usepackage[backend=biber, bibencoding=utf8, style=ieee, maxnames=99]{biblatex}
%\usepackage[backend=biber, bibencoding=utf8, style=apa]{biblatex}
%\usepackage[american]{babel}
%\DeclareLanguageMapping{american}{american-apa}  % after biblatex and babel
\usepackage[margin=20mm]{geometry}

\addbibresource{references.bib}

\begin{document}
\nocite{*}

\printbibliography{}
\end{document}

%%% Local Variables:
%%% mode: latex
%%% TeX-master: t
%%% End: