Cita APA (7th ed.)
Samuelson, P. A., & Nordhaus, W. D. (2005). Economics (18th ed.). Tata McGrawHill.
Cita Chicago (17th ed.)
Samuelson, Paul A., i William D. Nordhaus. Economics. 18th ed. New Delhi: Tata McGrawHill, 2005.
Cita MLA (9th ed.)
Samuelson, Paul A., i William D. Nordhaus. Economics. 18th ed. Tata McGrawHill, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.