Harris, K. (1973). Opera recordings: A critical guide. Drake.
Lua i Stíl Chicago (17ú heag.)Harris, Kenn. Opera Recordings: A Critical Guide. New York: Drake, 1973.
Lua MLA (9ú heag.)Harris, Kenn. Opera Recordings: A Critical Guide. Drake, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.