Eckhart, M. (1980). Breakthrough. Image Books.
Lua i Stíl Chicago (17ú heag.)Eckhart, Meister. Breakthrough. Garden City, New York: Image Books, 1980.
Lua MLA (9ú heag.)Eckhart, Meister. Breakthrough. Image Books, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.