Cita APA (7th ed.)
Powers, L. W. (2012). The world energy dilemma. PennWell.
Cita Chicago (17th ed.)
Powers, Louis W. The World Energy Dilemma. Tulsa, Okla.: PennWell, 2012.
Cita MLA (9th ed.)
Powers, Louis W. The World Energy Dilemma. PennWell, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.