Beethoven's opera Fidelio, containing the German text, with an English translation, and the music of all the principal airsFidelio. Libretto

Chicago citation style
Beethoven, Ludwig van, 1770-1827. Beethoven's opera Fidelio, containing the German text, with an English translation, and the music of all the principal airs,Fidelio. Libretto. c1892 by Heirs of T. Barker. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/006221262. (Accessed November 17, 2018.)
APA citation style
Beethoven, Ludwig van, 1770-1827, (c1892 by Heirs of T. Barker) Beethoven's opera Fidelio, containing the German text, with an English translation, and the music of all the principal airs,Fidelio. Libretto. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/006221262
MLA citation style
Beethoven, Ludwig van, 1770-1827. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/006221262>.
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