Vernadsky, George
Yele University Press, 1953
Buku Teks
Matsuoka, Yosuke
The Herald of Asia, 1938
Buku Teks
Jones, Francis Clifford
Royal Institute of International Affairs, 1949
Buku Teks
Sukarmiati
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1991
UI - Skripsi Membership
Howorth, Henry H.
Longmans, Green, 1927
Buku Teks