Gordis, Leon
Saunders Elsevier, 2009
Buku Teks SO
Gordis, Leon
Saunders Elsevier, 1996
Buku Teks SO
Robertson, Leon S.
Oxford University Press, 1992
Buku Teks SO
edited for the International Epidemiological Association by John M. Last ; associate editors, J.H. Abramson [and others]
Oxford University Press, 1995
Buku Referensi
Beaglehole, Robert
WHO, 1993
Buku Teks SO