Ray, John J.
Australian and New Zealand Book, 1974
Buku Teks
Rose, Dennis J
The Law Book Company Limited, 1967
Buku Teks
Schultz, Theodore W.
McGraw-Hill , 1945
Buku Teks
Blank, Leland, author
McGraw-Hill , 1983
Buku Teks
Meyer, A. J.
Harvard University Press, 1962
Buku Teks