APA (7th ed.) Citation

Philippines. Department of Environment and Natural Resources. Bureau of Mines and Geo-Sciences. Cordillera Administrative Region. (1990). Directory of producing mines and quarries. BOMGS, DENR.

Chicago Style (17th ed.) Citation

Philippines. Department of Environment and Natural Resources. Bureau of Mines and Geo-Sciences. Cordillera Administrative Region. Directory of Producing Mines and Quarries. Baguio City: BOMGS, DENR, 1990.

MLA (9th ed.) Citation

Philippines. Department of Environment and Natural Resources. Bureau of Mines and Geo-Sciences. Cordillera Administrative Region. Directory of Producing Mines and Quarries. BOMGS, DENR, 1990.