Gray-Davidson, Frena
Piatkus , 1994
Buku Teks
Brawley, Elizabeth C., author
John Wiley & Sons, 1997
Buku Teks
James, Vaughn E., author
American Management Association, 2009
eBooks
Sa`adatul Aliyah, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2017
UI - Skripsi Membership
Asty Nofika Utami, author
Fakultas Ilmu Keperawatan Universitas Indonesia, 2013
UI - Tugas Akhir