Sketchbook 1
MLA
Eld, Henry, 1814-1850. Sketchbook 1. Box 2 | Folder 1. 1838-1842. https://collections.library.yale.edu/catalog/16385418.
APA, 6th edition
Eld, Henry, 1814-1850. (["Box 2 | Folder 1"])(1838-1842)[Sketchbook 1]. https://collections.library.yale.edu/catalog/16385418.