Gaya APA

Press, T, O, U. (1972). Unit 1 Geochemical Data Unit 2 Composition and Structure of The Earth and Its Minerals Unit 3 Geochemical History of The Earth . London: The Open University Press.

Gaya MLA

Press, The, Open, University. "Unit 1 Geochemical Data Unit 2 Composition and Structure of The Earth and Its Minerals Unit 3 Geochemical History of The Earth". London: The Open University Press, 1972. Umum.