APA (7th ed.) Citation

Silverstein, A., Silverstein, V. B., & Nunn, L. S. (1998). Food chains. Twenty-First Century Books.

Chicago Style (17th ed.) Citation

Silverstein, Alvin, Virginia B. Silverstein, and Laura Silverstein Nunn. Food Chains. Brookfield, Conn.: Twenty-First Century Books, 1998.

MLA (9th ed.) Citation

Silverstein, Alvin, et al. Food Chains. Twenty-First Century Books, 1998.