Smith, Jon,author
Forest Stewardship Council, 2011
Buku Teks
Vandome, Nick, author
Financial World, 2012
Buku Teks
Lewis, Lynn S., author
American Management Association, 2008
eBooks
Lewis, Lynn Sparapany, author
American Society for Training & Development, 2008
eBooks
Eppstian Syah As`ari, author
2012
UI - Tesis (Open)