एपीए उद्धरण

Olson, J. (2000). Global business directory. Gemim books.

शिकागो स्टाइल उद्धरण

Olson, Jeff. Global Business Directory. Delhi: Gemim books, 2000.

एमएलए उद्धरण

Olson, Jeff. Global Business Directory. Gemim books, 2000.