Ray, Mary Barnard
Thomson West, 2008
Buku Teks
Biskind, Elliott L.
Clark Boardman, 1971
Buku Teks
Biskind, Elliott L.
Clark Boardman, 1971
Buku Teks
Garner, Bryan A.
The University of Chicago Press, 2001
Buku Teks
Haggard, Thomas R.
West Publishing, 1996
Buku Teks