Scherling, Mark, auhtor
CRC Press, 2011
Buku Teks
Grosse, Eric F.
[American Society for Training & Development Press, American Society for Training & Development Press], 2002
eBooks
Wiley-Blackwell, 2012
Buku Teks
Cho, kimball
Hayle Medical, 2015
Buku Teks
Scully, Crispian
Martin Dunitz, 1999
Buku Referensi