Antezana, Fernando
World Health Organization, 1996
Buku Teks
Kobelt, Gisela
Office of Health Economics, 2002
Buku Teks
Sorkin, Alan L.
Massachusetts Lexington Books, 1984
Buku Teks
edited by Lorna Guinness and Virginia Wiseman
McGraw-Hill, 2011
Buku Teks SO
Phelps, Charles E.
HarperCollins, 1992
Buku Teks