Mattocks, P. W., Hunn, E. S., & Wahl, T. R. (1977). A checklist of the birds of Washington State, with recent changes annotated. Phil Schaeffer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMattocks, Philip Ward, Eugene S. Hunn, और Terence R. Wahl. A Checklist of the Birds of Washington State, with Recent Changes Annotated. [Tiburon, Calif.: Phil Schaeffer, 1977.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMattocks, Philip Ward, et al. A Checklist of the Birds of Washington State, with Recent Changes Annotated. Phil Schaeffer, 1977.
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