Pyle, R. M. (2002). The butterflies of Cascadia: A field guide to all the species of Washington, Oregon, and surrounding territories. Seattle Audubon Society.
Cita Chicago Style (17a ed.)Pyle, Robert Michael. The Butterflies of Cascadia: A Field Guide to All the Species of Washington, Oregon, and Surrounding Territories. [Seattle]: Seattle Audubon Society, 2002.
Cita MLA (8a ed.)Pyle, Robert Michael. The Butterflies of Cascadia: A Field Guide to All the Species of Washington, Oregon, and Surrounding Territories. Seattle Audubon Society, 2002.
Precaución: Estas citas no son 100% exactas.