[Sonatas, keyboard, violin, violoncello, op. 1]. Six Sonatas for the PianoForte, or Harpsichord with an Accompanyment for a violin & violoncello.... Part (kbd). Print (London: author)
MLA
Ernest Augustus, King of Hanover, 1771-1851. [Sonatas, keyboard, violin, violoncello, op. 1]. Six Sonatas for the PianoForte, or Harpsichord with an Accompanyment for a violin & violoncello.... Part (kbd). Print (London: author). Box 89, folder 418. 1786. https://collections.library.yale.edu/catalog/10000210.
APA, 6th edition
Ernest Augustus, King of Hanover, 1771-1851. (["Box 89, folder 418"])(1786)[[Sonatas, keyboard, violin, violoncello, op. 1]. Six Sonatas for the PianoForte, or Harpsichord with an Accompanyment for a violin & violoncello.... Part (kbd). Print (London: author)]. https://collections.library.yale.edu/catalog/10000210.