Schwartz, Benjamin
Harvard University Press, 1952, 1961
Buku Teks SO
Schwartz, Benjamin
Harper Torchbooks and The Academy Library, 1967
Buku Teks SO
Brecher, Michael
Frederick A. Praeger, 1966
Buku Teks SO
Solomon, Richard H.
University of California Press, 1971
Buku Teks SO
Creel, Herrlee Glessner, 1905-1994
The University of Chicago Press , 1953
Buku Teks SO