Gaya APA

Porter, L, C, ,, E. (2008). Public Health Skills.A PRACTICAL GUIDE FOR NURSES AND PUBLIK HEALTH PRACTITIONERS . Amerika: Blackwell.

Gaya MLA

Porter, Lesley, Coles, ,, Elizabeth. "Public Health Skills.A PRACTICAL GUIDE FOR NURSES AND PUBLIK HEALTH PRACTITIONERS". Amerika: Blackwell, 2008. Buku Teks.