Kobelt, Gisela, author
Office of Health Economics, 2002
Buku Teks
Mooney, Gavin H., author
MacMillan Press , 1980
Buku Teks
Wonderling, David, author
Open University Press, 2005
Buku Teks
Clewer, Ann, author
Pearson Education, 1998
Buku Teks
Antezana, Fernando
World Health Organization, 1996
Buku Teks