Gaya APA

Bignham, R, C. (1990). Study guide to accompany McConnell and Brue economics (11th ed.). New York: McGraw-Hill Book Company.

Gaya MLA

Bignham, Robert, C.. "Study guide to accompany McConnell and Brue economics". 11th ed. New York: McGraw-Hill Book Company, 1990. Text.