APA (7th ed.) Citation

Facklam, H., & Facklam, M. (1994). Insects. Twenty-First Century Books.

Chicago Style (17th ed.) Citation

Facklam, Howard, and Margery Facklam. Insects. New York: Twenty-First Century Books, 1994.

MLA (9th ed.) Citation

Facklam, Howard, and Margery Facklam. Insects. Twenty-First Century Books, 1994.