Lippincott, Isaac, author
Appleton Century Croffs, 1933
Buku Teks
Currie, A.W.
Thomas Nelson, 1951
Buku Teks
Hayashida, Akiko, author
Universitas Indonesia, 2002
UI - Tesis (Membership)
Walinsky, Louis J.
The Twentieth Century Fund, 1962
Buku Teks
Karpinski, Andrzej, author
Polonia Publishing House, 1964
Buku Teks