Cahn, Steven M., author
Nelson-Hall, 1979
Buku Teks
Schaefer, William D.
Jossey-Bass , [1990, 1990]
Buku Teks
Walker, Melanie, author
Open University Press, 2004
Buku Teks
Marilee J. Bresciani Ludvik, editor; Gavin W. Henning, foreword; Ralph Wolff, foreword
Stylus Publishing, LLC, 2016
Buku Teks
Rosen, Andrew S., author
Kaplan, 2011
Buku Teks