APA aipamena

Sarkar, A. N. (2009). Petro-economics. Pentagon Energy Press.

Chicago Style aipamena

Sarkar, A. N. Petro-economics. New Delhi: Pentagon Energy Press, 2009.

MLA aipamena

Sarkar, A. N. Petro-economics. Pentagon Energy Press, 2009.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.