APA (7th ed.) Citation

Gee, Choy, & Makens. (1989). The travel industry (2nd ed.). Van Nostrand Reinhold.

Chicago Style (17th ed.) Citation

Gee, Choy, and Makens. The Travel Industry. 2nd ed. New York: Van Nostrand Reinhold, 1989.

MLA (9th ed.) Citation

Gee, et al. The Travel Industry. 2nd ed. Van Nostrand Reinhold, 1989.