Bodenheimer, Edgar
Harvard University Press, 1976
Buku Teks
Haggard, Thomas R.
West Publishing, 1996
Buku Teks
Squires, Lynn B.
West Publishing, 1982
Buku Teks
Cohen, Morris L.
West Publishing, 1968
Buku Teks
Berman, Paul Schiff, 1966-
Cambridge University Press, 2012
Buku Teks