Ruggero Leoncavallo - Wikipedia
- Wikipedia article with biography, lists of operas and operettas, and internal references to related people and topics.
- http://en.wikipedia.org/wiki/Ruggero_Leoncavallo

Ruggero Leoncavallo (1857-1919)
- Brief biographical sketch, caricature, summary of operatic works, and Naxos discography.
- http://www.naxos.com/composerinfo/613.htm

Ruggero Leoncavallo (1857 - 1919)
- Karadar dictionary entry with life, portraits and caricature, related composers, and listing of operas and operettas including the Italian libretto to I Pagliacci.
- http://www.karadar.it/Dictionary/leoncavallo.html

Ruggero Leoncavallo
- Find A Grave listing with birth and death dates, biography, cemetery information, and interactive memorial.
- http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=9903324&pt=Ruggero%20Leoncavallo

Ruggiero Leoncavallo
- Entry at the Lied and Art Songs Text Page with list of vocal works and selected lyrics.
- http://www.recmusic.org/lieder/l/leoncavallo.html

Leoncavallo, Ruggiero
- Biography outlining major successes and failures and noting his pioneering work in phonographic recording. From the Grove Concise Dictionary of Music entry at WQXR radio.
- http://www.wqxr.com/cgi-bin/iowa/cla/learning/grove.html?record=5315