Sarkar, A. N. (2009). Petro-economics. Pentagon Energy Press.
Chicago Style aipamenaSarkar, A. N. Petro-economics. New Delhi: Pentagon Energy Press, 2009.
MLA aipamenaSarkar, A. N. Petro-economics. Pentagon Energy Press, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.