Cite

[Egmont. op. 84. Clärchens Tod]

MLA

Speck, William A. (William Alfred), 1864-1928. [Egmont. op. 84. Clärchens Tod]. Box 1, folder 2. n.d.. https://collections.library.yale.edu/catalog/2032403.

APA, 6th edition

Speck, William A. (William Alfred), 1864-1928. (["Box 1, folder 2"])(n.d.)[[Egmont. op. 84. Clärchens Tod]]. https://collections.library.yale.edu/catalog/2032403.