MLA

Rouse, Ruth, 1872-1956. South Africa. Box 9, folder 27. 1906 April 18–1906 August. https://collections.library.yale.edu/catalog/33114761.

APA, 6th edition

Rouse, Ruth, 1872-1956. (["Box 9, folder 27"])(1906 April 18–1906 August)[South Africa]. https://collections.library.yale.edu/catalog/33114761.