Selby, C. (1840). The guardian sylph!, or, The magic rose!: A musical fairy interlude in one act (Duncombe's ed.). J. Duncombe.
Lua i Stíl Chicago (17ú heag.)Selby, Charles. The Guardian Sylph!, or, The Magic Rose!: A Musical Fairy Interlude in One Act. Duncombe's ed. London: J. Duncombe, 1840.
Lua MLA (8ú heag.)Selby, Charles. The Guardian Sylph!, or, The Magic Rose!: A Musical Fairy Interlude in One Act. Duncombe's ed. J. Duncombe, 1840.
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