Osborne, Richard. "Rome and Il barbiere di Siviglia (1816)." Rossini: His Life and Works. : Oxford University Press, 2007-10-25. Oxford Scholarship Online. 2011-10-03. Date Accessed 21 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195181296.001.0001/acprof-9780195181296-chapter-4>.
Osborne, R.(2007-10-25). Rome and Il barbiere di Siviglia (1816). In Rossini: His Life and Works. : Oxford University Press. Retrieved 21 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195181296.001.0001/acprof-9780195181296-chapter-4.
Osborne, Richard. "Rome and Il barbiere di Siviglia (1816)." In Rossini: His Life and Works. : Oxford University Press, 2007-10-25. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195181296.001.0001/acprof-9780195181296-chapter-4.
Osborne R. Rome and Il barbiere di Siviglia (1816). In: Osborne R. Rossini: His Life and Works. Oxford University Press; 2007. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195181296.001.0001/acprof-9780195181296-chapter-4. Accessed May 21, 2013.