reftex-ref-style-toggle
reftex-ref-style-toggle is a compiled Lisp function in `reftex.el
'.
(reftex-ref-style-toggle STYLE &optional ACTION)
Activate or deactivate the referencing style STYLE.
With the optional argument ACTION a certain action can be forced.
The symbol `activate' will activate the style and `deactivate'
will deactivate it.