Sadeghi, Sarmad, author
ones & Bartlett Learning, 2013
Buku Teks
Cunningham, Lynne, author
Jossey-Bass, 1991
Buku Teks
Kotler, Philip, author
Prentice-Hall, 1987
Buku Teks
edited by Wendy Leebov
American Hospital Publishing, 1994
Buku Teks
Charns, Martin P., author
Prentice-Hall, 1983
Buku Teks