APA (7th ed.) Citation

Ward, P. D. (1992). On Methuselah's trail: Living fossils and the great extinctions. W.H. Freeman.

Chicago Style (17th ed.) Citation

Ward, Peter Douglas. On Methuselah's Trail: Living Fossils and the Great Extinctions. New York: W.H. Freeman, 1992.

MLA (9th ed.) Citation

Ward, Peter Douglas. On Methuselah's Trail: Living Fossils and the Great Extinctions. W.H. Freeman, 1992.