MLA

Fenn, Courtenay H. (Courtenay Hughes), 1866-. A Legation building, Beijing, China, ca. 1900. Box 69 | Folder 3. 1900-1910. https://collections.library.yale.edu/catalog/11424084.

APA, 6th edition

Fenn, Courtenay H. (Courtenay Hughes), 1866-. (["Box 69 | Folder 3"])(1900-1910)[A Legation building, Beijing, China, ca. 1900]. https://collections.library.yale.edu/catalog/11424084.