Knapp, C. L. (1976). Problems in Contract Law: Cases and Materials. Little Brown & Co.
Čikaški stil citiranja (17. izdanje)Knapp, Charles L. Problems in Contract Law: Cases and Materials. Boston: Little Brown & Co, 1976.
MLA način citiranja (9. izdanje)Knapp, Charles L. Problems in Contract Law: Cases and Materials. Little Brown & Co, 1976.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.