Bibtex in-text citation using “et al.” How do you insert 's to indicate possession?

Question

I'm citing an in-text reference using natbib and a Harvard-style. The way I've constructed the sentence indicates possession, for example:

Smith et al.'s (2009) recent study ...

What I get when using \citet{} is:

Smith et al. (2009) recent study ...

Is there a way to add the apostrophe and s in this context? I tried placing it in the square brackets \citet[][]{} but that doesn't work.

Answer 1

It's not exactly pretty (especially if you're using hyperlinks or backreferences), but you could use \citeauthor{key}'s \citeyearpar{key}.

If you do this a lot you could define a command:

\newcommand{\citetapos}[1]{\citeauthor{#1}'s \citeyearpar{#1}}

That way you could avoid having to insert the key twice.