MLA

Parrott, Enoch Greenleafe, 1815-1879. Silhouette, daguerreotype. Box 1 | Folder 10. c. 1850. https://collections.library.yale.edu/catalog/16536580.

APA, 6th edition

Parrott, Enoch Greenleafe, 1815-1879. (["Box 1 | Folder 10"])(c. 1850)[Silhouette, daguerreotype]. https://collections.library.yale.edu/catalog/16536580.