Cite

Mignon. Klavierauszug.

MLA

Speck, William A. (William Alfred), 1864-1928. Mignon. Klavierauszug.. Box 2, folder 27. n.d.. https://collections.library.yale.edu/catalog/2064614.

APA, 6th edition

Speck, William A. (William Alfred), 1864-1928. (["Box 2, folder 27"])(n.d.)[Mignon. Klavierauszug.]. https://collections.library.yale.edu/catalog/2064614.