Cita APA (7a ed.)

Wyrick, T. L., & Arnold, R. A. (1989). Study guide to accompany economics. West Pub.

Cita Chicago Style (17a ed.)

Wyrick, Thomas L., y Roger A. Arnold. Study Guide to Accompany Economics. St. Paul, Minn: West Pub, 1989.

Cita MLA (9a ed.)

Wyrick, Thomas L., y Roger A. Arnold. Study Guide to Accompany Economics. West Pub, 1989.