Boss, R. Wayne, author
Addison-Wesley, 1989
Buku Teks
Wolper, Lawrence F., author
Jones & Bartlett, 2011
Buku Teks
An Aspen Publication, 1995
Buku Teks
Wolper, Lawrence F., author
Jones and Bartlett, 2011
Buku Teks
University of Hawaii, 1983
Buku Teks