Davies, Ivor K., author
McGraw-Hill, 1971
Buku Teks
Allen, Michael, author
American Society for Training & Development, 2012
eBooks
Borich, Gary D., author
Prentice-Hall, [date of publication not identified]
Buku Teks
Davies, Ivor K., author
McGraw-Hill, 1973
Buku Teks
Arends, Richard I., 1990-, author
McGraw-Hill, 2012
Buku Teks