Cita APA (7th ed.)

DUNBAR, C. O. a. R. (1957). Principles of stratigraphy. John Wiley.

Cita Chicago (17th ed.)

DUNBAR, Carl O. and RODGERS. Principles of Stratigraphy. New York: John Wiley, 1957.

Cita MLA (9th ed.)

DUNBAR, Carl O. and RODGERS. Principles of Stratigraphy. John Wiley, 1957.