Cita APA (7th ed.)
Samuelson, P. A., & Nordhaus, W. D. (1998). Economics (6th ed.). Tata Mcgraw-Hill.
Cita Chicago (17th ed.)
Samuelson, Paul A., i William D. Nordhaus. Economics. 6th ed. New York: Tata Mcgraw-Hill, 1998.
Cita MLA (9th ed.)
Samuelson, Paul A., i William D. Nordhaus. Economics. 6th ed. Tata Mcgraw-Hill, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.