Simple, just add this line at preamble.
\usepackage[style=authoryear]{biblatex} \renewcommand{\nameyeardelim}{\addcomma\addspace}
\usepackage[style=authoryear]{biblatex} \renewcommand{\nameyeardelim}{\addcomma\addspace}
My sky is high, blue, bright and silent.
Nugroho's (almost like junk) blog
By: Nugroho Adi Pramono