Cita APA (7a ed.)

Harbaugh, J. W. (1974). Stratigraphy and the geologic time scale (2nd ed.). W. C. Brown.

Cita Chicago Style (17a ed.)

Harbaugh, John W. Stratigraphy and the Geologic Time Scale. 2nd ed. Dubuque, Iowa.: W. C. Brown, 1974.

Cita MLA (8a ed.)

Harbaugh, John W. Stratigraphy and the Geologic Time Scale. 2nd ed. W. C. Brown, 1974.