Bryan, Cheryl, author
[American Library association, American Library association], 2007
eBooks
Johnson, Emory R., author
Appleton-Century-Crofts, 1947
Buku Teks
Finkel, Coleman, author
[American Society for Training and Development Press;, ], 2001
eBooks
Reynolds, Amanda, author
Open universtity press , 2000
Buku Teks
edited by Allan McNaught
Chapman and Hall , 1991
Buku Teks