Cowan, Stella Louise, author
[American Society for Training & Development Press, American Society for Training & Development Press], 2002
eBooks
Kraft, Michael E.
SAGE, 2015
Buku Teks
Graeme, Jerald G., author
McGraw-Hill, 1977
Buku Teks
Garnett, David, author
Longman , 1991
Buku Teks
King, Peter, author
Routledge, 2016
Buku Teks