Παραπομπή APA

James F Ragan & Lloyd B Thomas. (1990). Principles of Macroeconomics. Harcourt Brace Jovanovich.

Παραπομπή Chicago Style

James F Ragan και Lloyd B Thomas. Principles of Macroeconomics. San Diego: Harcourt Brace Jovanovich, 1990.

Παραπομπή MLA

James F Ragan και Lloyd B Thomas. Principles of Macroeconomics. Harcourt Brace Jovanovich, 1990.