Norton, Thomas James
America`s Future, Inc., 1946
Buku Teks
Mitchell, Broadus
Oxford University Press, 1964
Buku Teks
edited by Richard L. Perry and John C. Cooper
American Bar Foundation, 1964
Buku Teks
introduction by Edward G. Smith
Barnes & Noble, 1966
Buku Teks
Antieau, Chester James
Dennis & Co., 1960
Buku Teks