Cite

Map of the travels of Peter Pond (1740-1807), 1773 April-1790 March, "extracted from his own map" (MVP #974)

MLA

Stiles, Ezra, 1727-1795. Map of the travels of Peter Pond (1740-1807), 1773 April-1790 March, "extracted from his own map" (MVP #974). Box 89 (Oversize), folder 3219. 1790 March 25. https://collections.library.yale.edu/catalog/16945663.

APA, 6th edition

Stiles, Ezra, 1727-1795. (["Box 89 (Oversize), folder 3219"])(1790 March 25)[Map of the travels of Peter Pond (1740-1807), 1773 April-1790 March, "extracted from his own map" (MVP #974)]. https://collections.library.yale.edu/catalog/16945663.