APA Citation

Calkins, G. N., & Calkins, G. N. (1926). The Biology of the protozoa. Philadelphia: Lea & Febiger.

Chicago Style Citation

Calkins, Gary N., and Gary N. Calkins. The Biology of the Protozoa. Philadelphia: Lea & Febiger, 1926.

MLA Citation

Calkins, Gary N., and Gary N. Calkins. The Biology of the Protozoa. Philadelphia: Lea & Febiger, 1926.

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