Cita APA (7th ed.)
Shaffer, B. (2009). Energy politics. University of Pennsylvania Press.
Cita Chicago (17th ed.)
Shaffer, Brenda. Energy Politics. Philadelphia: University of Pennsylvania Press, 2009.
Cita MLA (9th ed.)
Shaffer, Brenda. Energy Politics. University of Pennsylvania Press, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.