Field, Shelly, author
Macmillan, 1998
Buku Referensi
Paradis, Adrian A., author
VGM Career Books, 2001
Buku Teks
Kuther, Tara L., author
Wadsworth/Cengage Learning, 2013
Buku Teks
Lines, June, author
Kogan Page, 1994
Buku Teks
Stair, Lila B.
Richard D. Irwin , 1980
Buku Teks