Copperud, R. (1961). Words on paper. Hawthorn Books.
Lua i Stíl Chicago (17ú heag.)Copperud, Roy. Words on Paper. New York, Estados Unidos: Hawthorn Books, 1961.
Lua MLA (9ú heag.)Copperud, Roy. Words on Paper. Hawthorn Books, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.