Vicki Smith, Patrizia Collard, Paula Nicolson, Rowan Bayne
Mc Graw-Hill, 2012
Buku Teks
Clark, Ruth Colvin, author
American Society for Training & Development, 2010
eBooks
Ruth Colvin Clark
ASTD Press, 2010
Buku Teks
Clark, Ruth Colvin, author
VA ATD Press, 2015
Buku Teks
French, Sally, author
Butterworth-Heinemann, 2001
Buku Referensi