Coon, Dennis, author
Wadsworth/Thomson Learning, 2006
Buku Teks
Corey, Marianne Schneider, author
Thomson/Brooks/Cole, 2006
Buku Teks
Vicki Smith, Patrizia Collard, Paula Nicolson, Rowan Bayne
Mc Graw-Hill, 2012
Buku Teks
Kirkwood, Colin
Sense, 2012
eBooks
Sage Publications, 2002
Buku Teks