MLA

Newell, Peter, 1862-1924. "In the Last Days of the Fair the Johnson Family Happen upon the Reproductions of Aztec Ruins," (published as "Yucatan Ruins" in Harper's Bazaar). Box 100, folder 1343. 1893 Nov 18. https://collections.library.yale.edu/catalog/16649376.

APA, 6th edition

Newell, Peter, 1862-1924. (["Box 100, folder 1343"])(1893 Nov 18)["In the Last Days of the Fair the Johnson Family Happen upon the Reproductions of Aztec Ruins," (published as "Yucatan Ruins" in Harper's Bazaar)]. https://collections.library.yale.edu/catalog/16649376.