MLA

Ochoa Carrillo, Antonio, 1811-1883. Juárez, Benito. Autograph letter, signed: Durango, to Antonio Ochoa Carrillo. Box 1, folder 69. 1867 January 8. https://collections.library.yale.edu/catalog/32320185.

APA, 6th edition

Ochoa Carrillo, Antonio, 1811-1883. (["Box 1, folder 69"])(1867 January 8)[Juárez, Benito. Autograph letter, signed: Durango, to Antonio Ochoa Carrillo]. https://collections.library.yale.edu/catalog/32320185.