Cite

Two men in front of a large group of mounted men

MLA

O'Hara, Geoffrey, 1882-1967. Two men in front of a large group of mounted men. Box 1, folder 43. circa 1913-1914. https://collections.library.yale.edu/catalog/2065308.

APA, 6th edition

O'Hara, Geoffrey, 1882-1967. (["Box 1, folder 43"])(circa 1913-1914)[Two men in front of a large group of mounted men]. https://collections.library.yale.edu/catalog/2065308.