MLA

Wharton, Edith, 1862-1937. Nieuwe Rotterdamsche Courant. Box 38, folder 1157. 1918-20. https://collections.library.yale.edu/catalog/17111174.

APA, 6th edition

Wharton, Edith, 1862-1937. (["Box 38, folder 1157"])(1918-20)[Nieuwe Rotterdamsche Courant]. https://collections.library.yale.edu/catalog/17111174.