APA (7th ed.) Citation

Mann, W. M. (1934). Wild animals in and out of the zoo. Smithsonian Institution.

Chicago Style (17th ed.) Citation

Mann, William M. Wild Animals in and Out of the Zoo. U.S.A: Smithsonian Institution, 1934.

MLA (9th ed.) Citation

Mann, William M. Wild Animals in and Out of the Zoo. Smithsonian Institution, 1934.