APA (7th ed.) Citation

Fortey, R. A. (1991). Fossils: The key to the past (New ed.). Harvard University Press.

Chicago Style (17th ed.) Citation

Fortey, Richard A. Fossils: The Key to the Past. New ed. Cambridge, Mass.: Harvard University Press, 1991.

MLA (9th ed.) Citation

Fortey, Richard A. Fossils: The Key to the Past. New ed. Harvard University Press, 1991.