juni
26
2010
It is not enough to do your best; you must know what to do, and then do your best.
William Edwards Deming
Whosoever desires constant success must change his conduct with the times.
Niccolo Machiavelli
Leergeluk Inzicht in je brein maakt leren fijn!Marloes Aarsman & Heidi van der Westerlaken Bij Bol.com