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.