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Lua i Stíl Chicago (17ú heag.)Walker, David. Harry Black. London: R. & R. Clark, LTD., 1958.
Lua MLA (9ú heag.)Walker, David. Harry Black. R. & R. Clark, LTD., 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.