Cita APA (7th ed.)

Pitt, E. R., & Leung, C. N. (2009). OPEC, oil prices and LNG. Nova Sciences Publishers.

Cita Chicago (17th ed.)

Pitt, Edward R., i Christopher N. Leung. OPEC, Oil Prices and LNG. New York: Nova Sciences Publishers, 2009.

Cita MLA (9th ed.)

Pitt, Edward R., i Christopher N. Leung. OPEC, Oil Prices and LNG. Nova Sciences Publishers, 2009.