McArdle, Geri E., author
American Society for Training & Development, 2007
eBooks
Guzowski, Mary, author
McGraw-Hill, 2000
Buku Teks
Adam Ritcjie, Randall Thomas, editor
Taylor & Francis Group, 2009
Buku Teks
Farr, Douglas, author
John Wiley & Sons, 2008
Buku Teks
Majalah, Jurnal, Buletin