APA (7th ed.) Citation

Eicher, D. L. (1968). Geologic time. Prentice-Hall, Inc..

Chicago Style (17th ed.) Citation

Eicher, Don L. Geologic Time. Englewood Cliffs, N.J.: Prentice-Hall, Inc., 1968.

MLA (9th ed.) Citation

Eicher, Don L. Geologic Time. Prentice-Hall, Inc., 1968.