Kuther, Tara L., editor
Wardworth, 2012
Buku Referensi
Kuther, Tara L., editor
Belmont, CA, 2006
Buku Teks
John Wiley & Sons, 2003
Buku Teks
Heiserman, David L.
Prentice-Hall, 1977
Buku Referensi
edited by Ron Sun
Cambridge University Press, 2008
Buku Referensi