Gaston Leroux. (2019). "Phantom of the Opera (Young Reading Level 2) [Paperback] [Jan 01, 2010] Gaston LeRoux". FQ Books.
Chicago-referens (17:e uppl.)Gaston Leroux. "Phantom of the Opera (Young Reading Level 2) [Paperback] [Jan 01, 2010] Gaston LeRoux". FQ Books, 2019.
MLA-referens (9:e uppl.)Gaston Leroux. "Phantom of the Opera (Young Reading Level 2) [Paperback] [Jan 01, 2010] Gaston LeRoux". FQ Books, 2019.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.