Cita APA (7a ed.)

Knight, C. (1955). The big book of real helicopters. Grosset & Dunlap.

Cita Chicago Style (17a ed.)

Knight, Clayton. The Big Book of Real Helicopters. New York: Grosset & Dunlap, 1955.

Cita MLA (9a ed.)

Knight, Clayton. The Big Book of Real Helicopters. Grosset & Dunlap, 1955.