MLA

Ochoa Carrillo, Antonio, 1811-1883. Azcárate, Juan Francisco. Autograph letter, signed: Guadalupe y Calvo, Chihuahua, to Antonio Ochoa Carrillo. Box 1, folder 39. 1865 July 23. https://collections.library.yale.edu/catalog/32319841.

APA, 6th edition

Ochoa Carrillo, Antonio, 1811-1883. (["Box 1, folder 39"])(1865 July 23)[Azcárate, Juan Francisco. Autograph letter, signed: Guadalupe y Calvo, Chihuahua, to Antonio Ochoa Carrillo]. https://collections.library.yale.edu/catalog/32319841.