MLA

Speck, William A. (William Alfred), 1864-1928. Correspondence (copies, excerpts) of Johann Wolfgang von Goethe with Graf Carl Friedrich Moritz Paul von Brühl. Box 9, folder 272. 1828. https://collections.library.yale.edu/catalog/2005302.

APA, 6th edition

Speck, William A. (William Alfred), 1864-1928. (["Box 9, folder 272"])(1828)[Correspondence (copies, excerpts) of Johann Wolfgang von Goethe with Graf Carl Friedrich Moritz Paul von Brühl]. https://collections.library.yale.edu/catalog/2005302.