APA

Bartholomew G. A., . (1952). Reproductive and social behavior of the northern elephant seal. Berkeley, C.A: University of California press.

Chicago

Bartholomew George A, . 1952. Reproductive and social behavior of the northern elephant seal. Berkeley, C.A: University of California press.

Harvard

Bartholomew G. A., . (1952). Reproductive and social behavior of the northern elephant seal. Berkeley, C.A: University of California press.

MLA

Bartholomew George A, . Reproductive and social behavior of the northern elephant seal. Berkeley, C.A: University of California press. 1952.