Arya, A., Arya, S., & Arya, M. (2011). Chemical carcinogen and cancer risk an overview. Journal of Chemical and Pharmaceutical Research, 3(5).
Doloksaribu, F., & Jukwati. (2008). Sintesis mineral berbasis silika dengan besi oksida melalui solution in situ [Laporan Penelitian].
William, H. B., & William, H. D. (1988). The principles of mineralogy. Brown Publisher.