MLA

Yale Peruvian Expedition ($d: 1911). Journal. Box 20, folder 30. 1914 June-December. https://collections.library.yale.edu/catalog/33346704.

APA, 6th edition

Yale Peruvian Expedition ($d: 1911). (["Box 20, folder 30"])(1914 June-December)[Journal]. https://collections.library.yale.edu/catalog/33346704.