APA

Pollock S., . (1997). Ecology. London: Doeling Kindersley.

Chicago

Pollock Steve, . 1997. Ecology. London: Doeling Kindersley.

Harvard

Pollock S., . (1997). Ecology. London: Doeling Kindersley.

MLA

Pollock Steve, . Ecology. London: Doeling Kindersley. 1997.