by Dwight Waldo ... [et.al.]
Duke University Press, 1970
Buku Teks
Marcel Dekker, Inc, 1990
Buku Teks
edited by John D. Montgomery, William J. Siffin
McGraw-Hill, 1966
Buku Teks
Simon, Herbert A., author
Alfred A. Knopf, 1973
Buku Teks
Bartholomew, Paul C., author
Littlefield, Adams, 1959
Buku Teks