Lowenfeld, Andreas F., author
Matthew Bender, 1988
Buku Teks
International Trade Centre Uctad/GATT, 1971
Buku Teks
Bhagwati, Jagdish, author
Penguin Books, 1969
Buku Teks
Cheshire, G. C.
At The Clarendon Press, 1952
Buku Teks
Morris, J.H.C.
At The Clarendon Press, 1960
Buku Teks