Kuther, Tara L., editor
Belmont, CA, 2006
Buku Teks
Kuther, Tara L., editor
Wadsworth and Cengage Learning, 2012
Buku Teks
Kuther, Tara L., editor
Wardworth, 2012
Buku Referensi
John Wiley & Sons, 2003
Buku Teks SO
Heiserman, David L., author
Prentice-Hall, 1977
Buku Referensi