Modifying natbib \citep

Question

I need to use a "modified Harvard" citation style for one of my papers, in which the citation should look like

(Jones, 1990:99)

where the author is Jones, the year is 1990 and the page is 99.

The closest I could get to that is via the natbib command:

\citep[99]{jones} yields: (Jones, 1990, 99)

But this isn't quite what I'm looking for. I would appreciate any ideas/suggestions.

Thanks!

[EDIT] Example:

\documentclass[11pt]{article}
\usepackage{natbib} 

\title{Hello}
\date{}
\begin{document}

\maketitle 

Hello. \citep[99]{jones} 

\bibliographystyle{agsm} 
\bibliography{mybib}   

\end{document}

Answer 1

Insert \setcitestyle{notesep={:}}in your preamble. It changes the separator from standard , to :.