Notebooks
MLA
Hartley, Marsden, 1877-1943. Notebooks. Box 10. undated. https://collections.library.yale.edu/catalog/16721054.
APA, 6th edition
Hartley, Marsden, 1877-1943. (["Box 10"])(undated)[Notebooks]. https://collections.library.yale.edu/catalog/16721054.