APA (7th ed.) Citation

Grell, K. G. (1973). Protozoology. Heidelberg.

Chicago Style (17th ed.) Citation

Grell, Karl G. Protozoology. New York: Heidelberg, 1973.

MLA (9th ed.) Citation

Grell, Karl G. Protozoology. Heidelberg, 1973.

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