APA Citation

Pennak, R. W. (1978). Fresh-water invertebrates of the united states (2nd ed.). New York: Wiley.

Chicago Style Citation

Pennak, Robert William. Fresh-water Invertebrates of the United States. 2nd ed. New York: Wiley, 1978.

MLA Citation

Pennak, Robert William. Fresh-water Invertebrates of the United States. 2nd ed. New York: Wiley, 1978.

Warning: These citations may not always be 100% accurate.