APA (7th ed.) Citation

Clapham, W. B. (1975). Natural ecosystems (6.print.). Macmillan.

Chicago Style (17th ed.) Citation

Clapham, Wentworth B. Natural Ecosystems. 6.print. New York: Macmillan, 1975.

MLA (9th ed.) Citation

Clapham, Wentworth B. Natural Ecosystems. 6.print. Macmillan, 1975.