Brent D. Slife, Richard N. Williams, and Sally H. Barlow
Sage, 2001
Buku Teks
Lister-Ford, Christine, author
Sage Publications, 2002
Buku Teks
Raymond A. Levy, editor
[, Springer], 2012
eBooks
Ashar Sunyoto Munandar, author
UI-Press, 2006
Buku Teks
Nicolson, Paula, author
MacMillan Education, 1986
Buku Teks