Cita APA (7th ed.)

Harbaugh, J. W. (1968). Stratigraphy and Geologic Time: Brown Foundations of Earth Science. WM. C. Brown Company Publishers.

Cita Chicago (17th ed.)

Harbaugh, John W. Stratigraphy and Geologic Time: Brown Foundations of Earth Science. USA: WM. C. Brown Company Publishers, 1968.

Cita MLA (9th ed.)

Harbaugh, John W. Stratigraphy and Geologic Time: Brown Foundations of Earth Science. WM. C. Brown Company Publishers, 1968.