Cita APA (7th ed.)

Hakes, D. R., & Mankiw, N. G. (2009). Principles of macroeconomics: Study guide (5th ed.). South-Western/Cengage Learning.

Cita Chicago (17th ed.)

Hakes, David R., i N. Gregory Mankiw. Principles of Macroeconomics: Study Guide. 5th ed. Australia: South-Western/Cengage Learning, 2009.

Cita MLA (9th ed.)

Hakes, David R., i N. Gregory Mankiw. Principles of Macroeconomics: Study Guide. 5th ed. South-Western/Cengage Learning, 2009.