APA (7th ed.) Zitazioa

Samuelson, P. A. (2013). Economics. McGraw ill Education.

Chicago Style (17th ed.) Zitazioa

Samuelson, Paul A. Economics. New Delhi: McGraw ill Education, 2013.

MLA (9th ed.) Zitazioa

Samuelson, Paul A. Economics. McGraw ill Education, 2013.