APA (7th ed.) Citation

Santos, E. P., & Bontes, A. V. Poblacion map of Libjo. s.n.

Chicago Style (17th ed.) Citation

Santos, Ernesto P., and Arturo V. Bontes. Poblacion Map of Libjo. [S.l: s.n.

MLA (9th ed.) Citation

Santos, Ernesto P., and Arturo V. Bontes. Poblacion Map of Libjo. s.n.

Warning: These citations may not always be 100% accurate.