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München [u.a.]: E. Reinhardt, 1998
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München [u.a.]: E. Reinhardt, 1993
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Boston [u.a.]: Pearson/A and B, 2005
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Boston [u.a.]: Allyn & Bacon, 2005
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Boston, Mass. [u.a.]: Allyn and Bacon, 1992
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Wiley, 1991
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Informa UK Limited, 1984
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SAGE Publications, 1981
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Wiley, 1978
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American Psychological Association (APA), 1974
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American Mental Health Counselors Association, 2012
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Wiley, 2007
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Wiley, 1982
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Wiley, 1990
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American Psychological Association (APA), 1970
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Elsevier BV, 1966
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Wiley, 1999
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Wiley, 1995
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Informa UK Limited, 2009