Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

Precaución: Estas citas no son 100% exactas.