edited by Craig Donnellan
Independence Educational Publishers, 1994
Buku Teks
Keel, Pamela K.
Pearson Prentice-Hall, 2005
Buku Teks
Robert-McComb, Jacalyn J.
CRC Press, 2011
Multimedia
Sarah Yuniar Puteri
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2020
UI - Skripsi (Membership)
Gilbert, Sara
Sage Publications, 2000
Buku Teks