APA (7th ed.) Zitazioa

Samuelson, P., & Nordhaus, W. (2015). Economics (19th ed.). McGraw Hill.

Chicago Style (17th ed.) Zitazioa

Samuelson, Paul, eta William Nordhaus. Economics. 19th ed. INDIA: McGraw Hill, 2015.

MLA (9th ed.) Zitazioa

Samuelson, Paul, eta William Nordhaus. Economics. 19th ed. McGraw Hill, 2015.