DePoy, Elizabeth, author
Brooks/Cole-Thomson Learning, 2003
Buku Teks
Wiersma, William, author
Pearson, 2009
Buku Teks
Koch, Tina, author
Blackwell Publishing, 2006
Buku Teks
Karin Sari Saputra, author
2015
UI - Tesis (Membership)
Argyris, Chris, author
Jossey-Bass, 1985
Buku Teks