Bruce, Anne, author
American Society for Training & Development Press, 2001
eBooks
Howe, Hubert S., author
Prentice-Hall, 1981
Buku Teks
Scharf, Charles A., author
Prentice-Hall, 1985
Buku Teks
Goldstein, Beth, author
McGraw-Hill, 2007
Buku Teks
Beck, Roger
McGraw-Hill, 1978
Buku Teks