Larrison, E. J., Johnson, M. D., & Miller, S. (1981). Birds of the Pacific Northwest: Washington, Oregon, Idaho, and British Columbia. University Press of Idaho.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLarrison, Earl J., Michael D. Johnson, और Stanlee Miller. Birds of the Pacific Northwest: Washington, Oregon, Idaho, and British Columbia. Moscow, Idaho: University Press of Idaho, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLarrison, Earl J., et al. Birds of the Pacific Northwest: Washington, Oregon, Idaho, and British Columbia. University Press of Idaho, 1981.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.