Gherardi, Silvia, author
Northampton, MA : Edward Elgar, 2012
Buku Teks
Munson, Lawrence S., author
McGraw-Hill, 1984
Buku Teks
editor, Cat Sharpe
[American Society for Training and Development Press, American Society for Training and Development Press], 1997
eBooks
Sabine Mertens Oishi
Thousand Oaks : SAGE PUBLIKATION, 2003,
Buku Referensi
Munson, Lawrence R.
McGraw-Hill, 1984
Buku Teks