Smith, Kevin, author
Westview Press, Boston, Massachusetts : Credo Reference, 2013
Buku Teks
Kurihara, Kenneth K., author
W.W. Nortorn, 1950
Buku Teks
Walker, E. Ronald, author
University of Chicago Press, 1947
Buku Teks
John Wiley & Sons, 2004
Buku Teks
Oxford University Press, 1996.
Buku Teks