Dürckheim, K. (1977). Hara: The vital centre of man. Unwin Books.
Lua i Stíl Chicago (17ú heag.)Dürckheim, Karlfried. Hara: The Vital Centre of Man. London: Unwin Books, 1977.
Lua MLA (8ú heag.)Dürckheim, Karlfried. Hara: The Vital Centre of Man. Unwin Books, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.