- Author: Yogi Ramacharaka/William Walker Atkinson
- Language: English
- Year: 2005
- Author: Yogi Ramacharaka William Walker Atkinson
- Language: English
- Year: 2014
- Author: Yogi Ramacharaka William Walker Atkinson
- Language: English
- Year: 2005
- Author: Yogi Ramacharaka/William Walker Atkinson
- Language: English
- Year: 2005