Rubbenstein, Harvey M.
John Wiley & Sons, 1992
Buku Teks
Saltzstein, Alan L., author
Thompson, 2003
Buku Teks
Saltzstein, Alan L., author
Wadsworth/Thomson learning, 2003
Buku Teks
Chapin, F. Stuart (Francis Stuart), 1916-, author
University of Illinois Press, 1979
Buku Teks
Bish, Robert L., author
McGraw-Hill Kogakusha, 1975
Buku Teks