Li, David H., author
Science Research Associates, 1972
Buku Teks
O`Brien, James A., 1936-, author
McGraw-Hill, 2006
Buku Teks
edited by Fred Gruenberger
Prentice-Hall, 1972
Buku Teks
Glandon, Gerald L., author
Health Administration Press, 2014
Buku Teks
edited by Ralph H. Sprague and Barbara C. McNurlin
Prentice-Hall International, 1993
Buku Teks