Schlesinger, Arthur Meier, author
Houghton Mifflin, 1960
Buku Teks
Brogan, D.W. (Denis William), author
Oxford University Press, 1950
Buku Teks
Ludwig, Emil, 1881-1948, author
Garden City Publishing, 1941
Buku Teks
Indra Hajar Aryanto H., author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2001
UI - Skripsi Membership
Sherwood, Robert E., author
Bantam Books, 1950
Buku Teks