Robinson, Glen O.
West Publishing, 1974
Buku Teks
Roy, Robert H.
John Hopkins Press, 1958
Buku Teks
Scheb, John M.
Thomson Wadworth, 2005
Buku Teks
Gellhorn, Ernest
West Publishing Company, 1972
Buku Teks
Lorch, Robert S.
Wayne State University Press, 1969
Buku Teks