Cita APA (7th ed.)
Wyant, F. R. (1977). The United States, OPEC, and Multinational Oil.
Cita Chicago (17th ed.)
Wyant, Frank R. The United States, OPEC, and Multinational Oil. 1977.
Cita MLA (9th ed.)
Wyant, Frank R. The United States, OPEC, and Multinational Oil. 1977.
Atenció: Aquestes cites poden no estar 100% correctes.