Gaya APA

EICHER, D, L., McALESTER, A, L. (1968). Geologic Time . New Jersey: PRENTICE-HALL, Inc..

Gaya MLA

EICHER, Don, L.., McALESTER, A., Lee. "Geologic Time". New Jersey: PRENTICE-HALL, Inc., 1968. Text.