Drew, Clifford J., author
A Bell & Howell Company, 1986
Buku Teks
Almira Istiqomah, author
2017
UI - Skripsi Membership
Payne, James S., author
Charles Merrill Publishing, 1981
Buku Teks
Lindsey, Mary P., author
Routledge, 1993
Buku Referensi
Azkia Ikrima, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2022
UI - Tesis Membership