Umlas, J. W. (2013). Grateful leadership: Using the power of acknowledgement to engage all your people and achieve superior results (1st edition.). McGraw-Hill.
Cita Chicago Style (17a ed.)Umlas, Judith W. Grateful Leadership: Using the Power of Acknowledgement to Engage All Your People and Achieve Superior Results. 1st edition. New York: McGraw-Hill, 2013.
Cita MLA (9a ed.)Umlas, Judith W. Grateful Leadership: Using the Power of Acknowledgement to Engage All Your People and Achieve Superior Results. 1st edition. McGraw-Hill, 2013.
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