Lua APA (7ú heag.)
Steen, M. (2014). Verdi's I Due Foscari: A short guide to a great opera. Original Writing.
Lua i Stíl Chicago (17ú heag.)
Steen, Michael. Verdi's I Due Foscari: A Short Guide to a Great Opera. Dublin, Ireland: Original Writing, 2014.
Lua MLA (9ú heag.)
Steen, Michael. Verdi's I Due Foscari: A Short Guide to a Great Opera. Original Writing, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.