APA (7th ed.) Citation

Erwin, D. H. (2006). Extinction: How life on earth nearly ended 250 million years ago. Princeton University Press.

Chicago Style (17th ed.) Citation

Erwin, Douglas H. Extinction: How Life on Earth Nearly Ended 250 Million Years Ago. Princeton, N.J.: Princeton University Press, 2006.

MLA (9th ed.) Citation

Erwin, Douglas H. Extinction: How Life on Earth Nearly Ended 250 Million Years Ago. Princeton University Press, 2006.