APA-referens (7:e uppl.)

Walstad, W. B., & Bingham, R. C. (1993). Study guide to accompany McConnell and Brue economics (12th ed.). McGraw - hill.

Chicago-referens (17:e uppl.)

Walstad, William B., och Robert C. Bingham. Study Guide to Accompany McConnell and Brue Economics. 12th ed. New York: McGraw - hill, 1993.

MLA-referens (9:e uppl.)

Walstad, William B., och Robert C. Bingham. Study Guide to Accompany McConnell and Brue Economics. 12th ed. McGraw - hill, 1993.