Encyclopædia Britannica Online, oppført som Placido Domingo, Encyclopædia Britannica Online-ID biography/Placido-Domingo, besøkt 9. oktober 2017[Hentet fra Wikidata]
digitalarchivioricordi.com
Archivio Storico Ricordi, Archivio Storico Ricordi person-ID 13560, besøkt 3. desember 2020[Hentet fra Wikidata]
Munzinger Personen, oppført som Placido Domingo, Munzinger IBA 00000015845, besøkt 9. oktober 2017[Hentet fra Wikidata]
operaliacompetition.org
«Operalia». Operalia. Arkivert fra originalen 2. februar 2017. Besøkt 22. januar 2017. «Plácido Domingo’s Operalia, The World Opera Competition, was founded in 1993 by Plácido Domingo to discover and help launch the careers of the most promising young opera singers of today. His goal is to attract singers of all voice tessituras and from every country in the world ranging from 18 to 32 years of age, to have them audition and be heard by a panel of distinguished international opera personalities, in the most prestigious and competitive showcase in the world. Each year, the Competition receives close to 1,000 applications.»
«Operalia». Operalia. Arkivert fra originalen 2. februar 2017. Besøkt 22. januar 2017. «Plácido Domingo’s Operalia, The World Opera Competition, was founded in 1993 by Plácido Domingo to discover and help launch the careers of the most promising young opera singers of today. His goal is to attract singers of all voice tessituras and from every country in the world ranging from 18 to 32 years of age, to have them audition and be heard by a panel of distinguished international opera personalities, in the most prestigious and competitive showcase in the world. Each year, the Competition receives close to 1,000 applications.»