APA (7th ed.) Citation

Eicher, D. L. (1976). Geologic time (2. ed., 1. print.). Prentice Hall Internat.

Chicago Style (17th ed.) Citation

Eicher, Don L. Geologic Time. 2. ed., 1. print. London: Prentice Hall Internat, 1976.

MLA (9th ed.) Citation

Eicher, Don L. Geologic Time. 2. ed., 1. print. Prentice Hall Internat, 1976.