MLA

Hollister, Howard K. (Howard Keys), b. 1889. This silhouette was cut in the bazaar building, Pan American Exposition June 1901. 1903 February 11. https://collections.library.yale.edu/catalog/2030700.

APA, 6th edition

Hollister, Howard K. (Howard Keys), b. 1889. (1903 February 11)[This silhouette was cut in the bazaar building, Pan American Exposition June 1901]. https://collections.library.yale.edu/catalog/2030700.