% Don't put a label in the bibliography at all.  Just use the unlabeled format

% instead.

\def\thebibliography#1{%

% Use a section if we are in article style and no \chapter is defined

\expandafter\ifx\csname chapter\endcsname\relax

\vspace*{\baselineskip}\section*{References}%

\else

\chapter*{Bibliography\markboth{\bibname}{\bibname}}%

\fi\list

 {}{\setlength{\labelwidth}{0pt}\setlength{\leftmargin}{\parindent}

 \setlength{\topsep}{0pt}

 \setlength{\itemindent}{-\parindent}

 \setlength{\parsep}{0pt}\setlength{\itemsep}{0pt}\vspace*{-\baselineskip}}

 \def\newblock{\hskip .11em plus .33em minus -.07em}

 \sloppy\clubpenalty4000\widowpenalty4000\small

 \sfcode`\.=1000\relax}

\let\endthebibliography=\endlist\normalsize



\def\@lbibitem[#1]#2{%

  \if\relax\@extra@b@citeb\relax\else

    \@ifundefined{br@#2\@extra@b@citeb}{}{%

     \@namedef{br@#2}{\@nameuse{br@#2\@extra@b@citeb}}}\fi

   \@ifundefined{b@#2\@extra@b@citeb}{\def\NAT@num{}}{\NAT@parse{#2}}%

   \item[]%

    \NAT@ifcmd#1(@)(@)\@nil{#2}}

\ifx\SK@lbibitem\@undefined\else

   \let\SK@lbibitem\@lbibitem

   \def\@lbibitem[#1]#2{%

     \SK@lbibitem[#1]{#2}\SK@\SK@@label{#2}\ignorespaces}\fi