Cleverley, William O.
Aspen Publishing, 1997
Buku Teks
edited by L. Fleming Fallon and Eric J. Zgodzinski
Jones and Barlett, 2005
Buku Teks
Buku Teks
Cook, J. Sue
Addison-Wesley, 1987
Buku Teks SO
Sullivan, Lisa M. (Lisa Marie), 1961- 2016
Jones & Bartlett Learning, 2012
Buku Teks SO