Gay, J. (2001). The beggar's opera. Alex Catalogue.
Cita Chicago (17th ed.)Gay, John. The Beggar's Opera. Raleigh, NC: Alex Catalogue, 2001.
Cita MLA (9th ed.)Gay, John. The Beggar's Opera. Alex Catalogue, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.