APA (7th ed.) Citation

Covich, A. P., & Thorp, J. H. (1991). Ecology and classification of North American freshwater invertebrates. Academic Press, Inc.

Chicago Style (17th ed.) Citation

Covich, Alan P., and James H. Thorp. Ecology and Classification of North American Freshwater Invertebrates. San Diego: Academic Press, Inc, 1991.

MLA (8th ed.) Citation

Covich, Alan P., and James H. Thorp. Ecology and Classification of North American Freshwater Invertebrates. Academic Press, Inc, 1991.