Heppenstall, R. (1961). The fourfold tradition: Notes on the French and English literatures, with some ethnological and historical asides. Barrie and Rockliff.
Lua i Stíl Chicago (17ú heag.)Heppenstall, Rayner. The Fourfold Tradition: Notes on the French and English Literatures, with Some Ethnological and Historical Asides. London: Barrie and Rockliff, 1961.
Lua MLA (9ú heag.)Heppenstall, Rayner. The Fourfold Tradition: Notes on the French and English Literatures, with Some Ethnological and Historical Asides. Barrie and Rockliff, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.