Παραπομπή σε μορφή APA (7η εκδ.)

Coyle, E. D., & Simmons, R. A. (2014). Understanding the global energy crisis. Published on behalf of the Global Policy Research Institute by Purdue University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Coyle, Eugene D., και Richard A. Simmons. Understanding the Global Energy Crisis. West Lafayette, Indiana: Published on behalf of the Global Policy Research Institute by Purdue University Press, 2014.

Παραπομπή σε μορφή MLA (9th εκδ.)

Coyle, Eugene D., και Richard A. Simmons. Understanding the Global Energy Crisis. Published on behalf of the Global Policy Research Institute by Purdue University Press, 2014.