Landis, James M.
Jale University Press, 1966
Buku Teks
Sathe, SP
Lexis Nexis, 2009
Buku Teks
Endicott, Timothy
Oxford University Press, 2015
Buku Teks
Foulkes, David, 1924-
Butterworth, 1990
Buku Teks
Schwartz, Bernard
Little, Brown & Co., 1991
Buku Teks