Mel Silberman, editor
American Society for Training & Development, 2005
eBooks
Mel Silberman, editor; Patricia Phillips, assistant editor
American Society for Training & Development, 2006
eBooks
Patricia Pulliam Phillips, editor
American Society for Training & Development, 2010
eBooks
Bittel, Lester Robert, author
Addison-Wesley Publishing Company, Inc., 1987
Buku Teks
Hirko, Buff, author
[American Library association, American Library association], 2004
eBooks