Cita APA (7th ed.)
Crowell, J. F. (1920). Government War Contracts.
Cita Chicago (17th ed.)
Crowell, John Franklin. Government War Contracts. New York, 1920.
Cita MLA (9th ed.)
Crowell, John Franklin. Government War Contracts. 1920.
Atenció: Aquestes cites poden no estar 100% correctes.