APA (7th ed.) Citation

SmithlhRobert Leo & Smith. Elements of ecology (4th ed.).

Chicago Style (17th ed.) Citation

SmithlhRobert Leo and Smith. Elements of Ecology. 4th ed. New YorklbAn imprint of Addison wesley longman,inclc1998.

MLA (9th ed.) Citation

SmithlhRobert Leo and Smith. Elements of Ecology. 4th ed.

Warning: These citations may not always be 100% accurate.