Wikipedia's entry on citing Wikipedia says that APA formatting requires that their page on plagiarism be formatted as:
Plagiarism. (n.d.). In Wikipedia. Retrieved August 10, 2004, from http://en.wikipedia.org/wiki/Plagiarism
In particular, the APA format requires the article name to take the place of the author.
To cite Wikipedia with BibTeX, they say to use the code:
@misc{ wiki:###,
author = "Wikipedia",
title = "Plagiarism --- {W}ikipedia{,} The Free Encyclopedia",
year = "2004",
url = "\url{http://en.wikipedia.org/w/index.php?title=Plagiarism&oldid=5139350}",
note = "[Online; accessed 22-July-2004]"
}
This however, puts Wikipedia as the author, among other things (and is therefore not in APA format).
The package I am using is apacite and the code I have for my bibliography is:
\usepackage{apacite}
\bibliographystyle{apacite}
\bibliography{FinalRoughDraft}
I have tried things like setting putting the title of the article in the author = ... field, but if I put, say, author = Estimation lemma, the output in the author position is "lemma, E." I have also tried putting quotation marks around the title, but this does not work either.
Is there any way to get around this?

author = "{Estimation lemma}". The extra braces are proving an extra group without sorting. I am sure we have such a question somewhere. – Marco Daniel Sep 29 '12 at 06:40