Norton, Thomas James, author
America`s Future, 1946
Buku Teks
Norton, Thomas James
America`s Future, Inc., 1946
Buku Teks
Mitchell, Broadus, author
Oxford University Press, 1964
Buku Teks
edited by Richard L. Perry and John C. Cooper
American Bar Foundation, 1964
Buku Teks
Mussatti, James
D. Van Nostrand Company, Inc., 1960
Buku Teks