edited by Theodore P. Kovaleff
M.E. Sharpe, 1994
Buku Teks
Calkins, Richard M.
Dow Jones-Irwin, 1981
Buku Teks
Hovenkamp, Herbert
West Publishing, 1993
Buku Teks
Posner, Richard A.
The University of Chicago, 1976
Buku Teks
edited by Sylvester E. Berki
Health, 1966
Buku Teks