APA aipamena

Danielsen, A. L. (1982). The evolution of OPEC. Harcourt Brace Jovanovich.

Chicago Style aipamena

Danielsen, Albert Leroy. The Evolution of OPEC. New York: Harcourt Brace Jovanovich, 1982.

MLA aipamena

Danielsen, Albert Leroy. The Evolution of OPEC. Harcourt Brace Jovanovich, 1982.