APA (7th ed.) Citation

Sibal, J. V., & Garcia, O. Y. (1992). Political map 90's. TNM Cooperative Library/Research Publications.

Chicago Style (17th ed.) Citation

Sibal, Jeorge V., and Oliver Y. Garcia. Political Map 90's. Quezon City: TNM Cooperative Library/Research Publications, 1992.

MLA (9th ed.) Citation

Sibal, Jeorge V., and Oliver Y. Garcia. Political Map 90's. TNM Cooperative Library/Research Publications, 1992.