Gay, J. (2001). The beggar's opera. Alex Catalogue.
Lua i Stíl Chicago (17ú heag.)Gay, John. The Beggar's Opera. Raleigh, NC: Alex Catalogue, 2001.
Lua MLA (9ú heag.)Gay, John. The Beggar's Opera. Alex Catalogue, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.