Cite

Latest map of island of Porto[sic] Rico, new territory U.S.A. / by J. M. Lago.

MLA

Lago, J. M. Latest Map of Island of Porto[Sic] Rico, New Territory U.S.A. / by J. M. Lago. Colton, Ohman & Co., 1898. https://collections.library.yale.edu/catalog/15821948.

APA, 6th edition

Lago, J. M. (1898). Latest map of island of Porto[sic] Rico, new territory U.S.A. / by J. M. Lago. [Maps]. Colton, Ohman & Co., https://collections.library.yale.edu/catalog/15821948.