APA (7th ed.) Citation

Jahn, T. L. (1949). How to know the protozoa: A pictured-key for identifying the more common fresh water, marine, and parasitic Protozoa, with elementary discussions of the importance of each group and of interesting facts conc.. W. C. Brown Publishers.

Chicago Style (17th ed.) Citation

Jahn, Theodore Louis. How to Know the Protozoa: A Pictured-key for Identifying the More Common Fresh Water, Marine, and Parasitic Protozoa, with Elementary Discussions of the Importance of Each Group and of Interesting Facts Conc.. Dubuque: W. C. Brown Publishers, 1949.

MLA (9th ed.) Citation

Jahn, Theodore Louis. How to Know the Protozoa: A Pictured-key for Identifying the More Common Fresh Water, Marine, and Parasitic Protozoa, with Elementary Discussions of the Importance of Each Group and of Interesting Facts Conc.. W. C. Brown Publishers, 1949.