I'm currently getting:
Surname, IN and Secondauthorsurname, FM.
I need:
Surname, IN, and Secondauthorsurname, FM.
Searching for "comma" in the documentation is impossible, since it also hits on "command"
\documentclass{memoir}
\usepackage[american]{babel}
\usepackage{biblatex}
\DeclareLanguageMapping{american}{american}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@Article{Reference:1994,
author = {First I. Last, and Second Y. Author},
title = {This is the article title},
journal = {T Journal T},
journallongtitle = {The Journal Title},
year = 1994,
volume = 50,
pages = {30--40}
}
}
\end{filecontents}
\addbibresource{\jobname.bib}
\nocite{*}
\begin{document}
\printbibliography
\end{document}

babel/polyglossia? If so, what language do you load? – moewe Nov 01 '13 at 17:20americanyou will not notice any difference, sincebiblatexdefaults toenglish=american.But try the MWE below withbritishinstead ofamericanand you will see a difference. – moewe Nov 01 '13 at 18:25andsuffices. So do not write{First I. Last, and Second Y. Author}but{First I. Last and Second Y. Author}.journallongtitledoes not seem to be a standard field. – moewe Nov 01 '13 at 18:26