Friedrichs, C. (2012). Seven simple tools to build a motivating work environment. Diplomica Verlag.
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Cita Chicago (17th ed.)
Friedrichs, Christian. Seven Simple Tools to Build a Motivating Work Environment. Hamburg: Diplomica Verlag, 2012.
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Cita MLA (9th ed.)
Friedrichs, Christian. Seven Simple Tools to Build a Motivating Work Environment. Diplomica Verlag, 2012.
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Atenció: Aquestes cites poden no estar 100% correctes.