APA (7th ed.) Citation

Eddy, S. (1969). How to know the freshwater fishes (2nd ed.). Brown.

Chicago Style (17th ed.) Citation

Eddy, Samuel. How to Know the Freshwater Fishes. 2nd ed. Dubuque, Iowa: Brown, 1969.

MLA (9th ed.) Citation

Eddy, Samuel. How to Know the Freshwater Fishes. 2nd ed. Brown, 1969.