Rouhani, F. (1971). A history of O.P.E.C. Praeger.
Cita Chicago (17th ed.)Rouhani, Fuad. A History of O.P.E.C. New York: Praeger, 1971.
Cita MLA (9th ed.)Rouhani, Fuad. A History of O.P.E.C. Praeger, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.