Cita APA (7th ed.)

Peterson, W. L. (1991). Principles of economics: Micro. Irwin.

Cita Chicago (17th ed.)

Peterson, Willis L. Principles of Economics: Micro. Homewood, Il.: Irwin, 1991.

Cita MLA (9th ed.)

Peterson, Willis L. Principles of Economics: Micro. Irwin, 1991.