APA (7th ed.) Citation

Petersen, H. C., & Lewis, W. C. (1988). Economics: The free enterprise system. South-Western Publishing Co..

Chicago Style (17th ed.) Citation

Petersen, Harold Craig, and W. Cris Lewis. Economics: The Free Enterprise System. Cincinnati: South-Western Publishing Co., 1988.

MLA (9th ed.) Citation

Petersen, Harold Craig, and W. Cris Lewis. Economics: The Free Enterprise System. South-Western Publishing Co., 1988.