APA aipamena

Roberts, P. (2004). The end of oil: On the edge of a perilous new world. Boston: Houghton Mifflin.

Chicago Style aipamena

Roberts, Paul. The End of Oil: On the Edge of a Perilous New World. Boston: Houghton Mifflin, 2004.

MLA aipamena

Roberts, Paul. The End of Oil: On the Edge of a Perilous New World. Boston: Houghton Mifflin, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.