Piskurich, George M., author
[American Society for Training & Development Press, American Society for Training & Development Press], 2001
eBooks
Garavaglia, Paul L., author
American Society for Training and Development Press, 2000
eBooks
Blundell, Jon, author
Oxford University Press, 1982
Buku Teks
Stokes, Roy, author
Gower, 1982
Buku Referensi
Andersen, Leslie P., author
Intext Educational, 1971
Buku Teks