Gardener, John W
Harper , 1968
Buku Teks
King, Martin Luther
Harper & Row Publhers, 1968
Buku Teks
Stephan Haggar, editor; Wonhyuk Lim, editor
Cambridge University Press, 2003
Buku Teks
Regan, William
Harper & Row, Publishers, 1970
Buku Teks
Cambridge University Press , 1989
Buku Teks