Cite

ALS : Carlsruhe, to Georg Joachim Göschen

MLA

Speck, William A. (William Alfred), 1864-1928. ALS : Carlsruhe, to Georg Joachim Göschen. Box 15, folder 610. 1791 Jul 12. https://collections.library.yale.edu/catalog/10257595.

APA, 6th edition

Speck, William A. (William Alfred), 1864-1928. (["Box 15, folder 610"])(1791 Jul 12)[ALS : Carlsruhe, to Georg Joachim Göschen]. https://collections.library.yale.edu/catalog/10257595.