APA (7. basım) Alıntı

Oppenheimer, E. J. (1980). Natural gas: The new energy leader. Pen and Podium Productions.

Chicago Style (17. basım) Atıf

Oppenheimer, Ernest J. Natural Gas: The New Energy Leader. New York, N.Y.: Pen and Podium Productions, 1980.

MLA (8th ed.) Atıf

Oppenheimer, Ernest J. Natural Gas: The New Energy Leader. Pen and Podium Productions, 1980.