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