APA-čujuhus (7. p.)
Steen, M. (2014). Verdi's I Due Foscari: A short guide to a great opera. Original Writing.
Chicago-čujuhus (17. p.)
Steen, Michael. Verdi's I Due Foscari: A Short Guide to a Great Opera. Dublin, Ireland: Original Writing, 2014.
MLA-čujuhus (9. p.)
Steen, Michael. Verdi's I Due Foscari: A Short Guide to a Great Opera. Original Writing, 2014.
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