Change separator of multiple authors in references using BibTeX

Question

I am working on my master thesis and I have problem with citing multiple authors. The separator in pdf is "and", but this is not correct in my language. Is there a simple solution to change this separator?

Thanks for every answer

here is MWE:

\documentclass{article}
\usepackage[numbers]{natbib}

\begin{document}
  blba bla bla bla bla bla bla \cite{x}

  \bibliographystyle{plain}
  \bibliography{references}
\end{document}

It produces results like:

Answer 1

First of all, from the command line, run

kpsewhich plain.bst

to know where the file plain.bst is. Its path should be TEXMF/bibtex/bst/base/.

Now copy plain.bst in the directory where your .tex file is, and rename it to myplain.bst.

Then open myplain.bst in your editor and search for the lines:

FUNCTION {format.names}
{ 's :=
  #1 'nameptr :=
  s num.names$ 'numnames :=
  numnames 'namesleft :=
    { namesleft #0 > }
    { s nameptr "{ff~}{vv~}{ll}{, jj}" format.name$ 't :=
      nameptr #1 >
    { namesleft #1 >
        { ", " * t * }
        { numnames #2 >
        { "," * }
        'skip$
          if$
          t "others" =
        { " et~al." * }
        { " and " * t * }
          if$
        }
      if$
    }
    't
      if$
      nameptr #1 + 'nameptr :=
      namesleft #1 - 'namesleft :=
    }
  while$
}

Replace them with the following

FUNCTION {format.names}
{ 's :=
  #1 'nameptr :=
  s num.names$ 'numnames :=
  numnames 'namesleft :=
    { namesleft #0 > }
    { s nameptr "{ff~}{vv~}{ll}{, jj}" format.name$ 't :=
      nameptr #1 >
    { namesleft #1 >
        { ", " * t * }
        { numnames #2 >
        { "," * }
        'skip$
          if$
          t "others" =
        { " et~al." * }
        { " " * t * }
          if$
        }
      if$
    }
    't
      if$
      nameptr #1 + 'nameptr :=
      namesleft #1 - 'namesleft :=
    }
  while$
}

and save the file.

Now in your document, replace

\bibliographystyle{plain}

with

\bibliographystyle{myplain}

and you're done.

MWE

\begin{filecontents*}{references.bib}
@article{x,
author = {Author, A and Buthor, B and Cuthor, C},
journal = {A journal},
title = {A title},
year = {2015}
}
\end{filecontents*}

\documentclass{article}
\usepackage[numbers]{natbib}

\begin{document}
  blba bla bla bla bla bla bla \cite{x}

  \bibliographystyle{myplain}
  \bibliography{references}
\end{document} 

Output:

Answer 2

If you're using biblatex, take a look on the biblatex manual, section 3.9.1 Generic Commands and Hooks.

\finalnamedelim is probably the bibliography string you want to change. You can do that easily with:

\renewcommand*{\finalnamedelim}{\addcomma\addspace}

You may also take a look at the \multinamedelim-string.