APA

Mayr E., . (1969). Principles of systematic zoology. : McGraw-Hill Book Co., New York.

Chicago

Mayr Ernst, . 1969. Principles of systematic zoology. : McGraw-Hill Book Co., New York.

Harvard

Mayr E., . (1969). Principles of systematic zoology. : McGraw-Hill Book Co., New York.

MLA

Mayr Ernst, . Principles of systematic zoology. : McGraw-Hill Book Co., New York. 1969.