MLA

Rouse, Ruth, 1872-1956. United States, Canada, Jamaica, Panama, Peru, Chile, Argentina, Uruguay, Brazil, Barbados, Trinidad. Box 4, folder 1. 1915 December 12–1916 May 25. https://collections.library.yale.edu/catalog/33114829.

APA, 6th edition

Rouse, Ruth, 1872-1956. (["Box 4, folder 1"])(1915 December 12–1916 May 25)[United States, Canada, Jamaica, Panama, Peru, Chile, Argentina, Uruguay, Brazil, Barbados, Trinidad]. https://collections.library.yale.edu/catalog/33114829.