APA (7th ed.) Citation

(1992). A geologic time scale 1989 (Reprint.). Cambridge Univ. Press.

Chicago Style (17th ed.) Citation

A Geologic Time Scale 1989. Reprint. Cambridge [u.a.]: Cambridge Univ. Press, 1992.

MLA (9th ed.) Citation

A Geologic Time Scale 1989. Reprint. Cambridge Univ. Press, 1992.

Warning: These citations may not always be 100% accurate.