Brooks, Elizabert C
Jones & Bartlett Learning, 2013
Buku Teks
Tucker, Edwin W.
Irwin, 1992
Buku Teks
Guido, Ginny Wacker
Prentice-Hall, 2006
Buku Teks
[edited by] Diana M. Bailey, Sharan L. Schwartzberg
F.A. Davis , 1995
Buku Teks
Pozgar, George D.
Jones & Bartllett, 2010
Buku Teks