documentclass{scrartcl}
usepackage[ngerman]{babel}
usepackage[T1]{fontenc}
usepackage[german]{babelbib}
usepackage{harvard}
usepackage[applemac]{inputenc}
begin{document}
bibliographystyle{dcu}%dcu%agsm
selectbiblanguage{german}
bibliography{Literatur}
nocite{AristotleNEde}
end{document}