авторWilliam Walker AtkinsonEl Poder Mental (abreviado)El Secreto del Exito (abreviado)Gedanken formen Erfolg - Weisheiten der großen Denker (Ungekürzt)The Secret of Success (abreviado)Thought Vibration or the Law of Attraction in the Thought WorldThought Vibration - The Law of Attraction in the Thought World (Unabridged)