Gaya APA

Friedman, G, D. (1986). Prinsip-prinsip Epidemiologi . Yogyakarta: Yayasan Essentia Medica.

Gaya MLA

Friedman, Gary, D.. "Prinsip-prinsip Epidemiologi". Yogyakarta: Yayasan Essentia Medica, 1986. Text.