Gradstein, F. M. e. (2012). Geologic time scale 2012. Elsevier.
Chicago Edition CitationGradstein, Felix M...[et.al]; ed. Geologic Time Scale 2012. Oxford: Elsevier, 2012.
MLA引文Gradstein, Felix M...[et.al]; ed. Geologic Time Scale 2012. Elsevier, 2012.
警告:這些引文格式不一定是100%准確.