APA

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

Chicago

Mann William M, . 1934. Wild animals in and out of the zoo. New York: Smithsonian Institution Series.

Harvard

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

MLA

Mann William M, . Wild animals in and out of the zoo. New York: Smithsonian Institution Series. 1934.