John Wiley & Sons, 1995
Buku Teks
Hickman, Craig R., author
New American Library, 1984
Buku Teks
edited by Mike Morrow ... [et al.]
Woodhead-Faulkner, 1992
Buku Teks
Schapiro, Leonard editor
Fredrick A. Praeger, 1963
Buku Teks
Johansen, Bob, author
Berrett-Koehler, 2012
Buku Teks