In the previous examples for the agsm bibliographic
style a `` &'' character is used to signify conjunction between a pair of names
or between the last two names of a list of names.
Similarly the word ``and'' is used for the dcu style.
With these two styles this convention may be overwritten by using
\renewcommand to redefine the command
\harvardand.
This should be done after the
\citationstyle command
(if used) as this
command resets it to the default for the style selected.