1915 January - May, 1915 September - 1916 Jun, Dec, 1917; undated
MLA
Yale Peruvian Expedition ($d: 1911). 1915 January - May, 1915 September - 1916 Jun, Dec, 1917; undated. Box 16, folder 283-289. 1915 January - May, 1915 September - 1916 Jun, Dec, 1917; undated. https://collections.library.yale.edu/catalog/33226197.
APA, 6th edition
Yale Peruvian Expedition ($d: 1911). (["Box 16, folder 283-289"])(1915 January - May, 1915 September - 1916 Jun, Dec, 1917; undated)[1915 January - May, 1915 September - 1916 Jun, Dec, 1917; undated]. https://collections.library.yale.edu/catalog/33226197.