United States. Forest Service & Scott, V. E. (1977). Cavity-nesting birds of North American forests.
Chicago Style (17th ed.) CitationUnited States. Forest Service and Virgil E. Scott. Cavity-nesting Birds of North American Forests. 1977.
MLA (9th ed.) CitationUnited States. Forest Service and Virgil E. Scott. Cavity-nesting Birds of North American Forests. 1977.
Warning: These citations may not always be 100% accurate.