maximum number of authors

Question

1. I want to write Boehler et.al. (2003) but I 'm getting names of all authors. How can I fix maximum number of authos with
2. How can I get 30 Sept. – 4 Oct. Currenty , I ' getting 30 Sept. 4 Oct

\documentclass{article}
\usepackage[natbibapa]{apacite}
\begin{document}
Some text \citet{BoehlerW2003}.
\bibliographystyle{apacite}
\bibliography{Mybiblo}% Change this to use a different bibliography database file.
\end{document}

Mybiblo.bib

@CONFERENCE{BoehlerW2003,
  author = {W. Boehler and  Vicent M. Bordas and  A. Marbs},
  title = {Investigating laser scanner accuracy},
  booktitle = {CIPA Symposium at Antalya, Turkey, 30 Sept. – 4 Oct},
  year = {2003},
  owner = {S.S},
  timestamp = {2013.06.02}
}

Answer 1

you could use the natbib package (available here), set it \bibliographystyle{apalike}.

If you want to change the amount of authors' name to appear (I think the default is two), you can set so by looking into the natbib package documentation

Some extra references:

BibTeX: How can I automatically reduce long author lists to "xxx et al."?

Answer 2

If you want Boehler et al. (2003), use the following:

\citeauthor{BoehlerW2003}\ \citeyearpar{BoehlerW2003}

For more commands, check the LaTeX Wikibook.