For what I understand, your bib file contains mistakes (authors order is important…). And to cite multiple references, just use \cite{<key1>,<key2>,…,<keyN>}
.
\documentclass{article}
\title{Ref}
\author{Ref}
\begin{filecontents}{\jobname.bib}
%[2]
@book{aem,
title={Advanced Engineering Mathematics},
author={Kreyszig, Erwin},
publisher={Wiley},
edition={6th},
year={1988}
}
%[3]
@inproceedings{speech,
title={A quadratic index assignment algorithm for vector quantisation over noisy transmission channels},
author={Talbot, Nicola and Cawley, Gavin},
booktitle={Proceedings of the Institute of Acoustics Autumn Conference on Speech and Hearing},
volume={18},
pages={195--199},
month=nov,
year={1996}
}
%[4]
@incollection{image,
title={A fast index assignment algorithm for robust vector quantisation of image data},
author={Talbot, Nicola and Cawley, Gavin},
publisher={Santa Barbara},
booktitle={Proceedings of the I.E.E.E International Conference on Image Processing},
address={California, USA},
month=oct,
year={1997}
}
%[1]
@article{noise,
title={A fast index assignment algorithm for vector quantization over noisy transmission channels},
author={Cawley, Gavin and Talbot, Nicola},
journal={I.E.E Electronic Letters},
volume={32},
pages={1343--1344},
number=15,
month=jul,
year={1996}
}
\end{filecontents}
\begin{document}
There is a very useful mathematics text book for engineering students written by Erwin Kreysig \cite{aem}. For those of you interested in the hazard from \textit{Clostridium botulinum} associated with
Alaskan native foods should refer to. For information on fast index assignment algorithm that uses quadratic assignment, see \cite{speech,noise,image}.
\bibliographystyle{plain}
\bibliography{\jobname}
\end{document}
which produces

Edit
Add the 5th reference and use biblatex
. Run with biber
and be sure having an updated .bib
file.
% !BIB TS-program = biber
% !TeX encoding = utf8
% !TeX spellcheck = en_GB
% !TeX TS-program = pdflatex
\documentclass{article}\usepackage[%
language=english,
% defernumbers=true,
backend=biber,
% backend=bibtex,
% sorting=ynt,
sorting=nyt,
% url=false,
%backref=true,
style=numeric,
]{biblatex}
\title{Ref}
\author{Ref}
\begin{filecontents}{\jobname.bib}
%[2]
@book{aem,
title={Advanced Engineering Mathematics},
author={Kreyszig, Erwin},
publisher={Wiley},
edition={6th},
year={1988}
}
%[3]
@inproceedings{speech,
title={A quadratic index assignment algorithm for vector quantisation over noisy transmission channels},
author={Talbot, Nicola and Cawley, Gavin},
booktitle={Proceedings of the Institute of Acoustics Autumn Conference on Speech and Hearing},
volume={18},
pages={195--199},
month=nov,
year={1996}
}
%[4]
@incollection{image,
title={A fast index assignment algorithm for robust vector quantisation of image data},
author={Talbot, Nicola and Cawley, Gavin},
publisher={Santa Barbara},
booktitle={Proceedings of the I.E.E.E International Conference on Image Processing},
address={California, USA},
month=oct,
year={1997}
}
%[1]
@article{noise,
title={A fast index assignment algorithm for vector quantization over noisy transmission channels},
author={Cawley, Gavin and Talbot, Nicola},
journal={I.E.E Electronic Letters},
volume={32},
pages={1343--1344},
number=15,
month=jul,
year={1996}
}
@inbook{Wainwright1993,
author = {Wainwright, Robert B.},
title = {Hazards from northern native foods},
booktitle = {Clostridium botulinum : ecology and control in foods},
year = {1993},
bookauthor = {Hauschild, Andreas, H. W. and Dodds, Karen, L.},
publisher = {M. Dekker},
language = {english},
location = {New York},
chapter = {12},
pages = {305-322},
}
\end{filecontents}
\addbibresource{\jobname.bib}
\begin{document}
There is a very useful mathematics text book for engineering students written by Erwin Kreysig \cite{aem}. For those of you interested in the hazard from \textit{Clostridium botulinum} associated with
Alaskan native foods should refer to. For information on fast index assignment algorithm that uses quadratic assignment, see \cite{speech,noise,image}.
And \cite{Wainwright1993}
\printbibliography
\end{document}
