Rivera, Ray J., author
American Society for Training & Development, 2007
eBooks
Betz, Frederick, author
Emerald, 2016
eBooks
Hashim Ali, author
Oxford University Press, 1999
Buku Teks
Nersesian, Roy L., author
PennWell, 1981
Buku Teks
Charlesworth, Edward A., author
Bellatine Books, 1989
Buku Teks