APA

Estados Unidos. Department of Agriculture, . (1956). Animal diseases. Washington, D.C: Government Printing Office.

Chicago

Estados Unidos. Department of Agriculture, . 1956. Animal diseases. Washington, D.C: Government Printing Office.

Harvard

Estados Unidos. Department of Agriculture, . (1956). Animal diseases. Washington, D.C: Government Printing Office.

MLA

Estados Unidos. Department of Agriculture, . Animal diseases. Washington, D.C: Government Printing Office. 1956.