Redman, Barbara Klug, author
Mosby , 1993
Buku Teks
Pinder, Ruth
MacMillan Press , 1990
Buku Teks
Radley, Alan
Thousand Oaks Sage , 1994
Buku Teks
edited by Elizabeth K. Carll
Praeger, 2007
Buku Teks
Kimbrough, Vickie J., author
Pearson, Prentice Hall, 2006
Buku Teks