LaTeX question and arabic/jewish question

[Angus Leeming]

I have a paper written by A. Ben Jebria in 1985. When I cite it, however, the 
citation appears as Jebria (1985), not as Ben Jebria (1985). How do I 
convince BibTeX that the surname is Ben Jebria?

I've tried enclosing the name in {} and have also written it as Ben~Jebria. 
All to no avail.

The arabic/jewish (pardon my ignorance: I'm not sure which!) question: is it 
"Ben Jebria" or "ben Jebria"?

Many thanks,
Angus

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