Aspen Systems Corp, 1983
Buku Teks
edited Lewis E. Weeks, Howard J. Berman, Gerald E. Bisbee
Health Administration Press, 1979
Buku Teks
Philipp Meuser, editor
DOM Publishers, 2011
Buku Teks
Redstone, Louis G.
McGraw-Hill, 1978
Buku Teks
by Michael Cichon ... [and others]
International Labour Office, 1999
Buku Teks