APA (7th ed.) Citation

Zim, H. S. 1. (1942). Parachutes. Harcourt.

Chicago Style (17th ed.) Citation

Zim, Herbert Spencer 1909. Parachutes. New York: Harcourt, 1942.

MLA (9th ed.) Citation

Zim, Herbert Spencer 1909. Parachutes. Harcourt, 1942.

Warning: These citations may not always be 100% accurate.