Artikel Jurnal
Coles, Robert
The Atlantic Monthly Press, 1986
Buku Teks
Rosen, Hugh, author
Colombia University Press, 1980
Buku Teks
Lawrenhce Erlbaum Associates,, 2014
Buku Teks
Fakultas Ilmu Keperawatan Universitas Indonesia, 2009
UI - Tugas Akhir