1. Backhausen, W., & Thommen, J.-P. (2003). Coaching. Wiesbaden: Gabler.
2. Berry, M. R. (2005). A comparison of face-to-face and distance coaching practices: The role of the working alliance in problem resolution. Unpublished doctoral dissertation, Georgia State University, Atlanta, Georgia.
3. Borlinghaus, R. (Hrsg.). (o. J.). Coaching 2.0. Kreuzlingen: Bora Text.
4. Bredl, K., Bräutigum, B., & Herz, D. (2012). Avatarbasierte Beratung und Coaching in 3D. In H. Geißler & M. Metz (Hrsg.), E-Coaching und Online-Beratung (S. 121–136). Wiesbaden: Springer.
5. Charbonneau, A. M. (2002). Participant self-perception about the cause of behavior change from a program of executive coaching. Unpublished doctoral dissertation, Alliant International University, Los Angeles, CA.