Rename Bibliography to References in LaTeX

If the Babel package is used,

For book or report class, add the following code in the preamble.

\addto\captionsenglish{\renewcommand{\bibname}{References}}

For article class, add the following code in the preamble.

\addto\captionsenglish{\renewcommand{\refname}{References}}

If the Babel package is NOT used,

For book or report class, add the following code in the preamble.

\renewcommand{\bibname}{References}

For article class, add the following code in the preamble.

\renewcommand{\refname}{References}