Gaya APA

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

Gaya MLA

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