Greenwood Press, 1986
Buku Teks
Wrightson, Patricia
Hutchinson, 1977
Buku Teks
Carroll, Lewis, author
A Tom Doherty Associates Book, 1992
Buku Teks
McDermott, Lynda Caryl, author
American Society for Training and Development, 2008
eBooks
Retna Tri Astut, author
Fakultas Ilmu Keperawatan Universitas Indonesia, 2012
UI - Tesis (Open)