Beverly Hills Sage 1988,
Buku Teks
Mann, Leon
Sydney John Wiley & Sons 1969,
Buku Teks
Garton, Alison F
Hove Lawrence Erlbaum Associates , 1995
Buku Teks
Provincetown : The Journal Press
Majalah, Jurnal, Buletin
Blackwell Publishing Limited - The Japan Group dynamics Association, 2007,
Majalah, Jurnal, Buletin