MLA

Yale Peruvian Expedition ($d: 1911). Notebook. Box 23, folder 55. 1914-1915. https://collections.library.yale.edu/catalog/33216836.

APA, 6th edition

Yale Peruvian Expedition ($d: 1911). (["Box 23, folder 55"])(1914-1915)[Notebook]. https://collections.library.yale.edu/catalog/33216836.