Gaya APA

Case, K, E., M, I, F, R, C, I, O, S. (2011). Principles of macroeconomics . New Jersey: Pearson International.

Gaya MLA

Case, Karl, E., M, I., Fair,, Ray, C, II., Oster,, Sharon. "Principles of macroeconomics". New Jersey: Pearson International, 2011. .