APA aipamena

EICHER, D. L. (1973). Geologic Time Don L. Eicher. Prentice Hall International.

Chicago Style aipamena

EICHER, Don L. Geologic Time Don L. Eicher. Prentice Hall International, 1973.

MLA aipamena

EICHER, Don L. Geologic Time Don L. Eicher. Prentice Hall International, 1973.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.