Beatty, Richard H.
John Wiley & Sons, 1995
Buku Teks
Grosse, Eric F.
[American Society for Training & Development Press, American Society for Training & Development Press], 2002
eBooks
Bostwick, Burdette E.
John Wiley & Sons, 1981
Buku Teks
Eyre, Vivian
Learning Express, 2000
Buku Teks
Beatty, Richard H.
John Wiley & Sons, 1986
Buku Teks