Pyle, R. M. (2002). The butterflies of Cascadia: A field guide to all the species of Washington, Oregon, and surrounding territories. Seattle Audubon Society.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPyle, Robert Michael. The Butterflies of Cascadia: A Field Guide to All the Species of Washington, Oregon, and Surrounding Territories. [Seattle]: Seattle Audubon Society, 2002.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPyle, Robert Michael. The Butterflies of Cascadia: A Field Guide to All the Species of Washington, Oregon, and Surrounding Territories. Seattle Audubon Society, 2002.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.