APA aipamena

PETRICK, J. A. (1966). Energy resource assessment - Alfred Petrick JR. Westview Press.

Chicago Style aipamena

PETRICK, JR. Alfred. Energy Resource Assessment - Alfred Petrick JR. Westview Press, 1966.

MLA aipamena

PETRICK, JR. Alfred. Energy Resource Assessment - Alfred Petrick JR. Westview Press, 1966.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.