Consulting Psychology Journal Practice and Research (2001) - Comment
doi: 10.1037/1061-4087.53.3.139  issn: 1939-0149  issn: 1065-9293 

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Deborah A. Levesque, Janice M. Prochaska, James O. Prochaska, Stephen R. Dewart, Leigh S. Hamby, William B. Weeks