APA (7th ed.) Citation

Willers, W. B. (1981). Trout biology: An angler's guide. University of Wisconsin Press.

Chicago Style (17th ed.) Citation

Willers, W. B. Trout Biology: An Angler's Guide. Madison, Wis.: University of Wisconsin Press, 1981.

MLA (9th ed.) Citation

Willers, W. B. Trout Biology: An Angler's Guide. University of Wisconsin Press, 1981.