jan
18
2012
Problems are to the mind what exercise is to the muscles, they toughen and make strong.
Norman Vincent Peale
The consumer is the most important part of the production line.
William Edwards Deming
Beïnvloeden van gedrag De nieuwe wetenschap om verandering te leidenJoseph Grenny, Kerry Patterson, David Maxfield, Ron McMillan, Al Switzler
Bij Managementboek