United States. Bureau of Biological Survey. (1918). Regulations governing collecting of birds and their nests and eggs on Federal bird reservations for scientific and propagating purposes. GPO.
Chicago Style (17th ed.) CitationUnited States. Bureau of Biological Survey. Regulations Governing Collecting of Birds and Their Nests and Eggs on Federal Bird Reservations for Scientific and Propagating Purposes. [Washington]: GPO, 1918.
MLA (9th ed.) CitationUnited States. Bureau of Biological Survey. Regulations Governing Collecting of Birds and Their Nests and Eggs on Federal Bird Reservations for Scientific and Propagating Purposes. GPO, 1918.
Warning: These citations may not always be 100% accurate.