edited by Alan F. Westin
W.W. Norton, 1961
Buku Teks
Schwartz, Bernard, author
Oxford University Press, 1996
Buku Teks
Peck, David W.
Greenwood Press , 1961
Buku Teks
Busch, Francis X.
The Bobbs-Merrill, 1957
Buku Teks
Kunstler, William M.
William-Morrow and company, 1962
Buku Teks