APA Style
Friedman, G, D. et al
(1986).
Prinsip-prinsip Epidemiologi
.
Yogyakarta:
Yayasan Essentia Medica.
MLA Style
Friedman, Gary, D.. et al.
"Prinsip-prinsip Epidemiologi".
Yogyakarta:
Yayasan Essentia Medica,
1986.
Text.