Tepperwein, K. (1990). Starke Willenskraft: Mental-Training (2. Aufl.). mvg-Verl.
Chicago Style (17th ed.) CitationTepperwein, Kurt. Starke Willenskraft: Mental-Training. 2. Aufl. München: mvg-Verl, 1990.
MLA (9th ed.) CitationTepperwein, Kurt. Starke Willenskraft: Mental-Training. 2. Aufl. mvg-Verl, 1990.
Warning: These citations may not always be 100% accurate.