Brent D. Slife, Richard N. Williams, and Sally H. Barlow
Sage, 2001
Buku Teks
Vicki Smith, Patrizia Collard, Paula Nicolson, Rowan Bayne
Mc Graw-Hill, 2012
Buku Teks
Bateman, Anthony, author
Brunner-Routledge, 2003
Buku Teks
Raymond A. Levy, editor
[, Springer], 2012
eBooks
Johnson, James H., author
Allyn and Bacon, 1997
Buku Teks