Cite

Military district no. 1. Department of northern Luzon.

MLA

Military District No. 1. Department of Northern Luzon. Office Chief Engineer, Division of the Philippines, 0AD. https://collections.library.yale.edu/catalog/12222063.

APA, 6th edition

Military district no. 1. Department of northern Luzon. (0 C.E.). [Maps]. Office Chief Engineer, Division of the Philippines, https://collections.library.yale.edu/catalog/12222063.