APA ציטוט

Gradstein, F. M. e. (2012). Geologic time scale 2012. Elsevier.

Chicago Edition Citation

Gradstein, Felix M...[et.al]; ed. Geologic Time Scale 2012. Oxford: Elsevier, 2012.

ציטוט MLA

Gradstein, Felix M...[et.al]; ed. Geologic Time Scale 2012. Elsevier, 2012.