Ahlbom, Anders
Epideology Resources, 1984
Buku Teks
Rothman, Kenneth J., author
Oxford University Press, 2002
Buku Teks
Beaglehole, Robert, author
WHO, 1993
Buku Teks
Mausnes, Judith S.
W.B. Saunders , 1985
Buku Teks
Morris, J.N.
Livingstone, 1975
Buku Teks