APA (7th ed.) Citation

Jahn, T. L., & Jahn, F. F. (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 concerning them. Wm. C. Brown.

Chicago Style (17th ed.) Citation

Jahn, Theodore Louis, and Frances Floed Jahn. 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 Concerning Them. Dubuque, Iowa: Wm. C. Brown, 1949.

MLA (9th ed.) Citation

Jahn, Theodore Louis, and Frances Floed Jahn. 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 Concerning Them. Wm. C. Brown, 1949.