APA (7th ed.) Citation

Silverstein, A., Silverstein, V. B., & Nunn, L. S. (1999). Snakes and such. Twenty-First Century Books.

Chicago Style (17th ed.) Citation

Silverstein, Alvin, Virginia B. Silverstein, and Laura Silverstein Nunn. Snakes and Such. Brookfield, Conn.: Twenty-First Century Books, 1999.

MLA (9th ed.) Citation

Silverstein, Alvin, et al. Snakes and Such. Twenty-First Century Books, 1999.