APA引文

Willis L Peterson. (1990). Principles of Economics: Macro (7th ed.). Universal.

Chicago Edition Citation

Willis L Peterson. Principles of Economics: Macro. 7th ed. New Delhi: Universal, 1990.

MLA引文

Willis L Peterson. Principles of Economics: Macro. 7th ed. Universal, 1990.

警告：這些引文格式不一定是100％准確.