Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1970
UI - Skripsi (Membership)
Henry, Nancy, author
Cambridge University Press, 2008
eBooks
Leitch, George
Victoria University Press, 1990
Buku Teks
Longstreet, Stephen.
Doubleday, 1970
Buku Teks
Vestal, Stanley, author
Random House, 1948
Buku Teks