Cita APA (7a ed.)

Kay, M., & Colbert, E. H. (1965). Stratigraphy and life history. John Wiley.

Cita Chicago Style (17a ed.)

Kay, Marshall, y Edwin H. Colbert. Stratigraphy and Life History. New York: John Wiley, 1965.

Cita MLA (9a ed.)

Kay, Marshall, y Edwin H. Colbert. Stratigraphy and Life History. John Wiley, 1965.