MLA

Spain. Comision hidrografica, United States. Adjutant-General's Office. Military Information Division. Carta general (en dos hojas) del Archipiélago Filipino.. BRBL_00023E. 1900. https://collections.library.yale.edu/catalog/15237623.

APA, 6th edition

Spain. Comision hidrografica, & United States. Adjutant-General's Office. Military Information Division. (["BRBL_00023E"])(1900)[Carta general (en dos hojas) del Archipiélago Filipino.]. https://collections.library.yale.edu/catalog/15237623.