Artikel Jurnal
Mealey, George A., author
Freeport-McMoran Copper & Gold, 1996
Buku Teks
Sunar Saputro, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2014
UI - Skripsi (Membership)
R. Ferdyanto G., author
1996
UI - Skripsi (Membership)
Ridley, John, 1957-, author
Cambridge University Press, 2013
Buku Teks