Yeats, W. B. (1970). The hour glass. Irish University Press.
Lua i Stíl Chicago (17ú heag.)Yeats, W. B. The Hour Glass. Shannon: Irish University Press, 1970.
Lua MLA (8ú heag.)Yeats, W. B. The Hour Glass. Irish University Press, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.