APA (7th ed.) Citation
ebrary, Inc, & Gradstein, F. M. (2012). The geologic time scale 2012. Elsevier.
Chicago Style (17th ed.) Citation
ebrary, Inc, and F. M. Gradstein. The Geologic Time Scale 2012. Amsterdam ; Boston: Elsevier, 2012.
MLA (9th ed.) Citation
ebrary, Inc, and F. M. Gradstein. The Geologic Time Scale 2012. Elsevier, 2012.
Warning: These citations may not always be 100% accurate.