edited by Joseph S. Wholey, Harry P. Hatry and Kathryn E. Newcomer
Jossey-Bass, 1994
Buku Referensi
edited by Albert N. Link, Nicholas S. Vonortas
Edward Elgar, 2013
Buku Teks
Smith, Michael J.
Oxford University Press, 2010
Buku Teks
Issel, L. Michele
Jones & Bartlett Learning, 2014
Buku Teks
Lee, Stuart D.
Facet, 2002
Buku Teks