Coba jelasin Lihat pula dari Rasio isotop stabil dong

Allègre C.J., 2008.  Isotope Geology (Cambridge University Press).

Faure G., Mensing T.M. (2004), Isotopes: Principles and Applications (John Wiley & Sons).

Hoefs J., 2004. Stable Isotope Geochemistry (Springer Verlag).

Sharp Z., 2006. Principles of Stable Isotope Geochemistry (Prentice Hall).