Hutabarat, Marihot B., author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 1992
UI - Tesis (Membership)
Ubaidillah (Bai RuindraI, author
Dompet Dhuafa, 2015
Buku Teks
Tatsunari, Iota, author
Gramedia Pusaka Utama, 2014
Buku Teks
Maslow, Abraham H., author
Harper & Row, 1970
Buku Teks
Saifuddin Chadavi, author
Fakultas Psikologi Universitas Indonesia, 2015
UI - Skripsi Membership