Cita APA (7a ed.)

Dunbar, C. O., & Rodgers, J. (1957). Principles of stratigraphy. John Wiley.

Cita Chicago Style (17a ed.)

Dunbar, Carl O., y John Rodgers. Principles of Stratigraphy. Nueva York: John Wiley, 1957.

Cita MLA (8a ed.)

Dunbar, Carl O., y John Rodgers. Principles of Stratigraphy. John Wiley, 1957.