APA (7th ed.) Citation

Prescott, G. W. (1970). How to know the freshwater algae. W. C. Brown Co..

Chicago Style (17th ed.) Citation

Prescott, G. W. How to Know the Freshwater Algae. Dubuque, Iowa: W. C. Brown Co., 1970.

MLA (9th ed.) Citation

Prescott, G. W. How to Know the Freshwater Algae. W. C. Brown Co., 1970.