APA (7th ed.) Zitazioa

SAMUELSON, P. A. (1967). Economics an introductory analysis. McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

SAMUELSON, Paul A. Economics an Introductory Analysis. New York: McGraw-Hill, 1967.

MLA (9th ed.) Zitazioa

SAMUELSON, Paul A. Economics an Introductory Analysis. McGraw-Hill, 1967.