Gardenswartz, Lee
Jossey-Bass Publishers, 1998
Buku Teks
Porter-O`Grady, Tim, author
Mosby Elsevier, 2011
Buku Teks
edited by John J. Glynn, David A. Perkins
W.B. Saunders, 1995
Buku Teks
Roman D. Jovey, editor
Health Care and Financial, 2002
Buku Teks
Wolper, Lawrence F., author
Jones & Bartlett, 2011
Buku Teks