APA (7th ed.) Citation

Walton, G. M., Marks, S. V., & Wykoff, F. C. (1989). Understanding economics today (2nd ed.). Irwin.

Chicago Style (17th ed.) Citation

Walton, Gary M., Steven V. Marks, and Frank C. Wykoff. Understanding Economics Today. 2nd ed. Homewood: Irwin, 1989.

MLA (9th ed.) Citation

Walton, Gary M., et al. Understanding Economics Today. 2nd ed. Irwin, 1989.