Knapp 1977, pp. 272–273. Knapp, J. Merrill (Summer 1977). "The Instrumentation Draft of Wagner's Das Rheingold". Journal of the American Musicological Society. 30 (2). University of California Press: 272–295. doi:10.2307/831220. JSTOR831220.
""The Nibelung's Ring" at Her Majesty's Theatre". The Musical Times. 23 (472): 322. 1 June 1882. doi:10.2307/3359110. JSTOR3359110.
Bailey 1977, p. 54. Bailey, Robert (July 1977). "The Structure of the "Ring" and Its Evolution". 19th-Century Music. 1 (1): 48–61. doi:10.2307/746769. JSTOR746769.
Bailey 1977, pp. 55–57. Bailey, Robert (July 1977). "The Structure of the "Ring" and Its Evolution". 19th-Century Music. 1 (1): 48–61. doi:10.2307/746769. JSTOR746769.
Knapp 1977, pp. 272–273. Knapp, J. Merrill (Summer 1977). "The Instrumentation Draft of Wagner's Das Rheingold". Journal of the American Musicological Society. 30 (2). University of California Press: 272–295. doi:10.2307/831220. JSTOR831220.
""The Nibelung's Ring" at Her Majesty's Theatre". The Musical Times. 23 (472): 322. 1 June 1882. doi:10.2307/3359110. JSTOR3359110.
Bailey 1977, p. 54. Bailey, Robert (July 1977). "The Structure of the "Ring" and Its Evolution". 19th-Century Music. 1 (1): 48–61. doi:10.2307/746769. JSTOR746769.
Bailey 1977, pp. 55–57. Bailey, Robert (July 1977). "The Structure of the "Ring" and Its Evolution". 19th-Century Music. 1 (1): 48–61. doi:10.2307/746769. JSTOR746769.
Voss 2013, p. unpaginated. Voss, Egon (2013). Der Ring des Nibelungen. in drei Aufzügen, WWV 86 B (1854-1856 (in German). Mainz: Schott. ISBN978-3-7957-9873-4. OCLC854991820.