Cite

Letters of introduction

MLA

Yale Peruvian Expedition ($d: 1911). Letters of introduction. Box 2, folder 22. 1914-1915. https://collections.library.yale.edu/catalog/33346141.

APA, 6th edition

Yale Peruvian Expedition ($d: 1911). (["Box 2, folder 22"])(1914-1915)[Letters of introduction]. https://collections.library.yale.edu/catalog/33346141.