Ross, Alan O., author
McGraw-Hill, 1976
Buku Teks
Merrell, Kenneth W., author
Routledge, 2007
Buku Teks
American Society for Training and Development Research
American Society for Training & Development, 2013
eBooks
Miles, Matthew W., author
Allyn and Bacon, 1970
Buku Teks
McLaughlin, Barry
The Free Press, 1971
Buku Teks