APA استشهاد

Snodgrass, R. E. (1935). Principles of insect morphology. McGraw-Hill.

استشهاد بنمط شيكاغو

Snodgrass, R E. Principles of Insect Morphology. New York: McGraw-Hill, 1935.

MLA استشهاد

Snodgrass, R E. Principles of Insect Morphology. McGraw-Hill, 1935.