Bruch, Mathias, author
Westview Press, 1984
Buku Teks
edited by Norman N. Barish and Michel Verhulst
Pergamon Press , 1965
Buku Teks
Hicks, Ursula K., author
Clarendon Press, 1961
Buku Teks
Heller, Walter W.
[publisher not identified], 1974?
Buku Teks
M. Hadi Soesastro, author
Asian Development Bank , 1988
Buku Teks