Birch, J. (2011). The Meaning of hatha in Early Hathayoga.
Lua i Stíl Chicago (17ú heag.)Birch, J. The Meaning of Hatha in Early Hathayoga. 2011.
Lua MLA (9ú heag.)Birch, J. The Meaning of Hatha in Early Hathayoga. 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.