Owens, Edgar, author
Gadjah mada University Press, 1980
Buku Teks
Yayasan Obor Indonesia, 2006
Buku Teks
Universitas Indonesia, 2005
UI - Skripsi (Membership)
Gilpin, Robert, author
Princeton University Press, 1965
Buku Teks
Yayasan Obor Indonesia, 2005
Buku Teks