* Berger, William, "Puccini Without Excuses: A Refreshing Reassessment of the World's Most Popular Composer", Random House Digital, 2005, ISBN 1-4000-7778-8.
* Berger, William, "Puccini Without Excuses: A Refreshing Reassessment of the World’s Most Popular Composer", Random House Digital, 2005, ISBN 1-4000-7778-8.