Cite

January - April 30

MLA

Yale Peruvian Expedition ($d: 1911). January - April 30. Box 6, folder 33-54. January - April 30. https://collections.library.yale.edu/catalog/33224516.

APA, 6th edition

Yale Peruvian Expedition ($d: 1911). (["Box 6, folder 33-54"])(January - April 30)[January - April 30]. https://collections.library.yale.edu/catalog/33224516.