Hayden, R. Those winter sundays: Robert Hayden. The Midwest.(1979).
Lua i Stíl Chicago (17ú heag.)Hayden, Robert. "Those Winter Sundays: Robert Hayden." The Midwest.(1979) .
Lua MLA (8ú heag.)Hayden, Robert. "Those Winter Sundays: Robert Hayden." The Midwest.(1979), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.