Elgar, E. (1899). Enigma Variations: Opus 36 / Edward Elgar. Novello.
Lua i Stíl Chicago (17ú heag.)Elgar, Edward. Enigma Variations: Opus 36 / Edward Elgar. Sevenoaks, Kent: Novello, 1899.
Lua MLA (8ú heag.)Elgar, Edward. Enigma Variations: Opus 36 / Edward Elgar. Novello, 1899.
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