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
Lorna Guinness, Virginia Wiseman
McGraw-Hill, 2011
Buku Teks
Phelps, Charles E.
Harper Collins, 1992
Buku Teks