Nelson, W. (1956). Frank Duff with Group at the Speakers Table, 1956. eCommons.
Lua i Stíl Chicago (17ú heag.)Nelson, Wayne. Frank Duff with Group at the Speakers Table, 1956. eCommons, 1956.
Lua MLA (8ú heag.)Nelson, Wayne. Frank Duff with Group at the Speakers Table, 1956. eCommons, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.