Martens, R. (2012). Successful coaching (4.). Human Kinetics.
Chicago Edition CitationMartens, Rainer. Successful Coaching. 4. Usa: Human Kinetics, 2012.
MLA Edition CitationMartens, Rainer. Successful Coaching. 4. Human Kinetics, 2012.
Warning: These citations may not always be 100% accurate.