reftex-ref-style-alist

reftex-ref-style-alist is a variable defined in `reftex-vars.el'.
Its value is shown below.

Documentation:
Alist of reference styles.
Each element is a list of the style name, the name of the LaTeX
package associated with the style or t for any package, and an
alist of macros where the first entry of each item is the
reference macro and the second a key for selecting the macro when
the macro type is being prompted for. (See also
`reftex-ref-macro-prompt'.) The keys, represented as characters,
have to be unique.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.3 of Emacs.

Value:

(("Default" t
  (("\\ref" 13)
   ("\\pageref" 112)))
 ("Varioref" "varioref"
  (("\\vref" 118)
   ("\\vpageref" 103)
   ("\\Vref" 86)
   ("\\Ref" 82)))
 ("Fancyref" "fancyref"
  (("\\fref" 102)
   ("\\Fref" 70)))
 ("Hyperref" "hyperref"
  (("\\autoref" 97)
   ("\\autopageref" 117)))
 ("Cleveref" "cleveref"
  (("\\cref" 99)
   ("\\Cref" 67)
   ("\\cpageref" 100)
   ("\\Cpageref" 68))))