APA (7e ed.) Bronvermelding

Knapp, C. L. (1976). Problems in Contract Law: Cases and Materials. Little Brown & Co.

Chicago (17e ed.) Bronvermelding

Knapp, Charles L. Problems in Contract Law: Cases and Materials. Boston: Little Brown & Co, 1976.

MLA (9e ed.) Bronvermelding

Knapp, Charles L. Problems in Contract Law: Cases and Materials. Little Brown & Co, 1976.