Παραπομπή APA

Gregory, P. R., & Ruffin, R. J. (1989). Basic macroeconomics. Forseman Company.

Παραπομπή Chicago Style

Gregory, Paul R., και Roy J. Ruffin. Basic Macroeconomics. Scott: Forseman Company, 1989.

Παραπομπή MLA

Gregory, Paul R., και Roy J. Ruffin. Basic Macroeconomics. Forseman Company, 1989.