Cita APA

Pennak, R. W. (1953). Freshwater invertebrates of the United states.

Citación estilo Chicago

Pennak, Robert W. Freshwater Invertebrates of the United States. Ronald Press Co., New York, 1953.

Cita MLA

Pennak, Robert W. Freshwater Invertebrates of the United States. 1953.

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