Japan Times, 2000
Buku Teks
Mason, Edward S., author
Fordham University Press, 1958
Buku Teks
Simbolon, Junius, author
Fakultas Teknik Universitas Indonesia, 2016
UI - Tesis Membership
Ika Aulia Kirana, author
Fakultas Kedokteran Universitas Indonesia, 2015
UI - Skripsi (Membership)
Andrus, J.Russell
Stanford University Press, 1947
Buku Teks