Armstrong, Bruce K.
Oxford University Press, 1994
Buku Referensi
Walker, Alexander M.
Lower Falls Epidemiology Resainces, 1991
Buku Teks
Rothman, Kenneth J.
Lippincott Williams / Wilkins, 2008
Buku Teks
MacMahon, Brian
Little, Brown and Company, 1970
Buku Teks
Gordis, Leon
Saunders Elsevier, 2009
Buku Teks