APA (7th ed.) Citation

(1989). Mentales Training: Leistungssteigerung durch Konzentration (Authorized German language ed., 1. German print.). Time-Life-Bücher.

Chicago Style (17th ed.) Citation

Mentales Training: Leistungssteigerung Durch Konzentration. Authorized German language ed., 1. German print. Amsterdam: Time-Life-Bücher, 1989.

MLA (9th ed.) Citation

Mentales Training: Leistungssteigerung Durch Konzentration. Authorized German language ed., 1. German print. Time-Life-Bücher, 1989.

Warning: These citations may not always be 100% accurate.