Dr. Estrella's Incredibly Abridged Dictionary of Composers: Gian Carlo Menotti: (1911-Living), Italy. Includes biographical data, recommended CDs, books and sheet music, bibliography, and links to biographical essays.
Gian Carlo Menotti: Filmography at IMDb lists motion pictures and television productions featuring his music.
Masterworks Concert: Menotti's Amahl and the Night Visitors: Information about the opera and words about the music by the composer.