Tupan
Pusat jasa Perpustakaan dan Informasi ( Perpustakaan Nasional RI), 2013
Artikel Jurnal
Hutahuruk, Toho Jefta, author
2006
Artikel Jurnal
Yuldawati, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2008
UI - Tesis (Open)
Anisa Farhana Sausan, author
Fakultas Psikologi Universitas Indonesia, 2019
UI - Skripsi Membership
written by the Staff of the Science and Technology Information Service
British Library , 1991
Buku Teks