APA (7th ed.) Citation

Peterson, W. L. (1989). Principles of economics: Macro (7th ed.). Universal Book Stall.

Chicago Style (17th ed.) Citation

Peterson, Willis L. Principles of Economics: Macro. 7th ed. New Delhi: Universal Book Stall, 1989.

MLA (8th ed.) Citation

Peterson, Willis L. Principles of Economics: Macro. 7th ed. Universal Book Stall, 1989.