Tidd, Joseph, author
John Wiley & Sons, 2013
Buku Teks
Zentner, Matthew, author
Springer, 2012
eBooks
Cadzow, Linda, author
[American Society for Training & Development Press, American Society for Training & Development Press], 2002
eBooks
United Nations Centre for Human Settlements (Habitat), 1991
Buku Referensi
Artikel Jurnal