APA (7th ed.) Citation

Cato, P. S., McNamara, J. F., Slack, R. D., & Steele, D. G. (1990). Variations in natural history museums in the central United States.

Chicago Style (17th ed.) Citation

Cato, Paisley S., James F. McNamara, R. Douglas Slack, and D. Gentry Steele. Variations in Natural History Museums in the Central United States. 1990.

MLA (9th ed.) Citation

Cato, Paisley S., et al. Variations in Natural History Museums in the Central United States. 1990.