Calkins, Richard M.
Dow Jones-Irwin, 1981
Buku Teks
edited by Theodore P. Kovaleff
M.E. Sharpe, 1994
Buku Teks
Hovenkamp, Herbert
West Publishing, 1993
Buku Teks
editorial board, Harvey M. Apbaum ... [and others]
American Bar Association, 1975
Buku Teks
edited by Werner Sichel
Ann Arbor, 1970
Buku Teks