natbib author-year-page separator

Question

This should be a no-brainer but I haven't seen an example anywhere:

\citep[253--256]{sean2003game}

with bibpunct like

\bibpunct{(}{)}{:}{a}{,}{~}}

outputs

(Riley, 2004, 253-256)

I need to output

(Riley, 2004:253-256)

Does \bibpunct support custom page separators?

Answer 1

You can use the optional argument of \bibpunct to change the character (and spacing) preceding the post-note; in your case, you can use

\bibpunct[:]{(}{)}{:}{a}{,}{~}