Cite

Map of the river and valley of the Magdalena : and their connections with the principal towns.

MLA

Map of the River and Valley of the Magdalena : and Their Connections with the Principal Towns. E.E. Britton, 0AD. https://collections.library.yale.edu/catalog/15821041.

APA, 6th edition

Map of the river and valley of the Magdalena : and their connections with the principal towns. (0 C.E.). [Maps]. E.E. Britton, https://collections.library.yale.edu/catalog/15821041.