MLA

Rouse, Ruth, 1872-1956. South America (Argentina, Brazil, Chile, Panama, Peru, Uruguay). Box 4, folder 12. 1916. https://collections.library.yale.edu/catalog/33114941.

APA, 6th edition

Rouse, Ruth, 1872-1956. (["Box 4, folder 12"])(1916)[South America (Argentina, Brazil, Chile, Panama, Peru, Uruguay)]. https://collections.library.yale.edu/catalog/33114941.