emacs.d/snippets/latex-mode/label.yasnippet

 -*- mode: snippet -*-
# contributor : Márcio M. Ribeiro <marcio.mr@gmail.com>
# key: lab
# group: references
# name : \label
# --
\label{${1:label$(unless yas/modified-p (reftex-label nil 'dont-insert))}}$0