Mattocks, P. W., Hunn, E. S., & Wahl, T. R. (1977). A checklist of the birds of Washington State, with recent changes annotated. Phil Schaeffer.
Chicago Style (17th ed.) CitationMattocks, Philip Ward, Eugene S. Hunn, and Terence R. Wahl. A Checklist of the Birds of Washington State, with Recent Changes Annotated. [Tiburon, Calif.: Phil Schaeffer, 1977.
MLA (8th ed.) CitationMattocks, Philip Ward, et al. A Checklist of the Birds of Washington State, with Recent Changes Annotated. Phil Schaeffer, 1977.
Warning: These citations may not always be 100% accurate.