Milburn, Michael A.
California Brooks/Cole Pub. , 1991
Buku Teks
Smith, Rogers M., author
Cambridge, 2003
Buku Teks
Liddle, R. William, author
Allen & Unwin, 1996
Buku Teks
edited by Claire Holt
Cornell University Press, 1972
Buku Teks
Equinox, 2007
Buku Teks