United States. Department of Agriculture. (1938). Regulations governing the recognition of breeds and books of record of purebred animals. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture. Regulations Governing the Recognition of Breeds and Books of Record of Purebred Animals. [Washington]: [s.n.], 1938.
MLA (9th ed.) CitationUnited States. Department of Agriculture. Regulations Governing the Recognition of Breeds and Books of Record of Purebred Animals. [s.n.], 1938.
Warning: These citations may not always be 100% accurate.