MLA

Ochoa Carrillo, Antonio, 1811-1883. Juárez, Benito. Secretarial letter, signed: Mexico City, to Antonio Ochoa Carrillo. Box 1, folder 71. 1867 December 28. https://collections.library.yale.edu/catalog/32320197.

APA, 6th edition

Ochoa Carrillo, Antonio, 1811-1883. (["Box 1, folder 71"])(1867 December 28)[Juárez, Benito. Secretarial letter, signed: Mexico City, to Antonio Ochoa Carrillo]. https://collections.library.yale.edu/catalog/32320197.