Warhus, Susan, author
McGraw-Hill, 2007
Buku Teks
Palmore, James A., author
East West Center Press, 1987
Buku Teks
Moche, Dinah L., author
John Wiley & Sons, 1981
Buku Teks
Craghan, Michael, author
John Wiley & Sons, 2003
Buku Teks
Kuhn, Karl F., author
John Wiley & Sons, 1979
Buku Teks