Heller, R., & Goodell, W. (1949). Let voices ring. Hall & McCreary.
Lua i Stíl Chicago (17ú heag.)Heller, Ruth.,comp, agus Walter.,comp Goodell. Let Voices Ring. Chicago: Hall & McCreary, 1949.
Lua MLA (9ú heag.)Heller, Ruth.,comp, agus Walter.,comp Goodell. Let Voices Ring. Hall & McCreary, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.