Social Relationships
edited by Joseph P. Forgas and Julie Fitness
Psychology Press, 2008
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Gerber, Philip L., author
Effective english
Random House, 1959
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Achua, Christopher F., author
Effective leadership
South Western Cengage Learning, 2013
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Cook, Marshall J. ,author
Effective coaching
McGraw-Hill, 2011
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Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
The effective executive
Harper & Row, 1996
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