Cite

Léopold I, King of the Belgians (to Manuel Montt)

MLA

Koch, Frederick R. (Frederick Robinson). Léopold I, King of the Belgians (to Manuel Montt). Box 23, folder 494. 1857 Jul 29. https://collections.library.yale.edu/catalog/17341480.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 23, folder 494"])(1857 Jul 29)[Léopold I, King of the Belgians (to Manuel Montt)]. https://collections.library.yale.edu/catalog/17341480.