Cita APA (7th ed.)

Frank, H. J. (1966). Crude oil prices in the Middle East: A study in oligopolistic price behavior. Praeger.

Cita Chicago (17th ed.)

Frank, Helmut Jack. Crude Oil Prices in the Middle East: A Study in Oligopolistic Price Behavior. New York: Praeger, 1966.

Cita MLA (9th ed.)

Frank, Helmut Jack. Crude Oil Prices in the Middle East: A Study in Oligopolistic Price Behavior. Praeger, 1966.

Atenció: Aquestes cites poden no estar 100% correctes.