Concentration is the key to economic results. No other principles of effectiveness is violated as constantly today as the basic principle of concentration
Peter Drucker
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juni
14
2011
Concentration is the key to economic results. No other principles of effectiveness is violated as constantly today as the basic principle of concentration
Peter Drucker
Hou op met nadenken over wát je ziet, denk na over waaróm je het ziet. Deepak Chopra |
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