Beckett, S. (1961). Happy days: A play in two acts. Grove Press.
Lua i Stíl Chicago (17ú heag.)Beckett, Samuel. Happy Days: A Play in Two Acts. New York, NY: Grove Press, 1961.
Lua MLA (8ú heag.)Beckett, Samuel. Happy Days: A Play in Two Acts. Grove Press, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.