APA

Snodgrass R. E., . (1935). Principles of insect morphology. New York: McGraw-Hill Book Company, inc.

Chicago

Snodgrass R E, . 1935. Principles of insect morphology. New York: McGraw-Hill Book Company, inc.

Harvard

Snodgrass R. E., . (1935). Principles of insect morphology. New York: McGraw-Hill Book Company, inc.

MLA

Snodgrass R E, . Principles of insect morphology. New York: McGraw-Hill Book Company, inc. 1935.