APA (7th ed.) Citation

Leakey, R. E., & Lewin, R. (1995). The sixth extinction: Patterns of life and the future of humankind (First edition.). Doubleday.

Chicago Style (17th ed.) Citation

Leakey, Richard E., and Roger Lewin. The Sixth Extinction: Patterns of Life and the Future of Humankind. First edition. New York: Doubleday, 1995.

MLA (9th ed.) Citation

Leakey, Richard E., and Roger Lewin. The Sixth Extinction: Patterns of Life and the Future of Humankind. First edition. Doubleday, 1995.