APA-referens (7:e uppl.)

Yohe, G. W. (1989). Study guide to accompany samuel economics (Third edition.). Mcgraw hill.

Chicago-referens (17:e uppl.)

Yohe, Gary W. Study Guide to Accompany Samuel Economics. Third edition. New York: Mcgraw hill, 1989.

MLA-referens (9:e uppl.)

Yohe, Gary W. Study Guide to Accompany Samuel Economics. Third edition. Mcgraw hill, 1989.