एपीए उद्धरण

Sampson, A. (1975). The seven sisters: The greate oil companies and the world they shaped. New York: Bantam Books, Inc.

शिकागो स्टाइल उद्धरण

Sampson, Anthony. The Seven Sisters: The Greate Oil Companies and the World They Shaped. New York: Bantam Books, Inc, 1975.

एमएलए उद्धरण

Sampson, Anthony. The Seven Sisters: The Greate Oil Companies and the World They Shaped. New York: Bantam Books, Inc, 1975.