Rotondo, Jennifer
McGraw-Hill, 2002
Buku Teks
Thiagarajan, Sivasailam Thiagi
[American Society for Training & Development Press, American Society for Training & Development Press], 2001
eBooks
Ritchie, John C.
Prentice-Hall, 2002
Buku Teks
Brusino, Justin
American Society for Training & Development, 2008
eBooks
Atwood, Christee Gabour
American Society for Training & Development, 2007
eBooks