APA aipamena

Peterson, W. L. (1986). Principles of ecconomics. Universal Book Stall.

Chicago Style aipamena

Peterson, Willis L. Principles of Ecconomics. New Delhi: Universal Book Stall, 1986.

MLA aipamena

Peterson, Willis L. Principles of Ecconomics. Universal Book Stall, 1986.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.