(2007). Organisationsberatung, Supervision, Coaching. Organisationsberatung, Supervision, Coaching.
Cita Chicago Style (17a ed.)"Organisationsberatung, Supervision, Coaching." Organisationsberatung, Supervision, Coaching 2007.
Cita MLA (8a ed.)"Organisationsberatung, Supervision, Coaching." Organisationsberatung, Supervision, Coaching, 2007.
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