A1) Method 1:
      a) first include "usepackage{fancybox}"
      b) then use
           slideframe{shadow} or
           slideframe{double} or
           slideframe{oval} or
           slideframe{Oval}
         to change frame style or use
           slideframe{none}
         to create slides without frame
     note: put these commands in the preamble will cause all slides have 
the same frame unless you use another slideframe command to change it.
The above commands can be used within any begin{slide}...end{slide}.

  Method 2:
    a) first include "usepackage{semcolor}"
    b) then use
      slideframe{scplain} or
      slideframe{scshadow} or
      slideframe{scdouble} or
      slideframe{none}

You can use the package "natbib". The following is an example:

documentclass[12pt]{article}
usepackage[super, sort]{natbib}
bibpunct{(}{)}{;}{a}{,}{,} % required for natbib

begin{document}

Use the natbib package with options texttt{super} and texttt{sort}, 
and use verb+citep+ or verb+citet+
instead of the command verb+cite+. In detail, we need to include the 
natbib package
and include the line

begin{verbatim}
bibliographystyle[super, sort]{natbib}
bibpunct{(}{)}{;}{a}{,}{,}
end{verbatim}

in the preamble. 

And use the bibliographstyle texttt{plainnat}, i.e.
verb+bibliographystyle{plainnat}+.

The command
verb+citet+ is for ``last name (year)'' and verb+citep+ for 
``(last name, year)'' which will be shown in the text.


The result of verb+citep{GoossensEtAl:1999}+ is citep{GoossensEtAl:1999}.
The result of verb+citetcitet{GoossensEtAl:1999}+ is citet{GoossensEtAl:1999}.

bibliographystyle{plainnat} % required for natbib
bibliography{workshop}

end{document}

The content of the file "

workshop.bib

" is below:

@book{GoossensEtAl:1999,
  author="{Goossens, M.} and {Rahtz, S.} with {Gurari, E., M.} and {Moore, R.} and {Sutor, R.  S.}",
  title="The LaTeX, Web Companion",
  publisher="Addison-Wesley",
  year="1999"
} 

You can copy the above two files to your computer and compile them to see the

result

.