Davies, Ivor K., author
McGraw-Hill, 1971
Buku Teks
Borich, Gary D., author
Prentice-Hall, [date of publication not identified]
Buku Teks
Lawrence Erlbaum Associates, 1983
Buku Teks
Hodell, Chuck, author
American Society for Training & Development, 2006
eBooks
Hodell, Chuck, author
American Society for Training & Development, 2010
eBooks