APA

Pollock S., . (1997). Ecology. London: A dorling Kindersley Book.

Chicago

Pollock Steve, . 1997. Ecology. London: A dorling Kindersley Book.

Harvard

Pollock S., . (1997). Ecology. London: A dorling Kindersley Book.

MLA

Pollock Steve, . Ecology. London: A dorling Kindersley Book. 1997.