APA (7th ed.) Citation

Guppy, C. S., & Shepard, J. (2001). Butterflies of British Columbia: Including western Alberta, southern Yukon, the Alaska Panhandle, Washington, northern Oregon, northern Idaho, northwestern Montana. UBC Press.

Chicago Style (17th ed.) Citation

Guppy, Crispin Spencer, and Jon Shepard. Butterflies of British Columbia: Including Western Alberta, Southern Yukon, the Alaska Panhandle, Washington, Northern Oregon, Northern Idaho, Northwestern Montana. Vancouver: UBC Press, 2001.

MLA (9th ed.) Citation

Guppy, Crispin Spencer, and Jon Shepard. Butterflies of British Columbia: Including Western Alberta, Southern Yukon, the Alaska Panhandle, Washington, Northern Oregon, Northern Idaho, Northwestern Montana. UBC Press, 2001.