Dukeminier, Jesse
Harcourt Brace & Company, 1991
Buku Teks
Bridge, Michael G.
Blackstone Press Limited, 1996
Buku Teks
Browder, Olin L.
West Publishing Co, 1984
Buku Teks
Buckle, Stephen, author
Oxford University Press, 1991
Buku Teks
Cambridge University Press, 2004
Buku Teks