Blough, Roy
McGraw-Hill, 1966
Buku Teks
Globerman, Steven
Prentince-Hall, 1986
Buku Teks
Folsom, Ralph Haughwout, author
St. Paul, Minn, 1995
Buku Teks
Uhle, Christian Buhring
Kluwer Law International, 1996
Buku Teks
Behrman, Jack N., author
McGraw-Hill, 1971
Buku Teks