Encyclopedia of practical management 1 : leadership
by Walter J. Wadsworth
Gemini Books, 2000
 Buku Referensi
Brusino, Justin
Great presentations: presentation skills & games
American Society for Training & Development, 2008
 eBooks
Encyclopedia of practical management 4 : delegating work
by Joseph T. Straub
Gemini Books, 2000
 Buku Referensi
Encyclopedia of practical management 5 : hiring excellence
by Hardy Caldwell
Gemini Books, 2000
 Buku Referensi
Encyclopedia practical management 7 : building and leading teams
by Joseph T. Straub
Gemini Books, 2000
 Buku Referensi