Hauptman, P., & Upshur, J. A. (1975). Fun with English. Collier Macmillan International.
Cita Chicago (17th ed.)Hauptman, Philip, i John A. Upshur. Fun with English. New York: Collier Macmillan International, 1975.
Cita MLA (9th ed.)Hauptman, Philip, i John A. Upshur. Fun with English. Collier Macmillan International, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.