APA (7th ed.) Citation

Obra, B. Q., Miranda, F. E., & Delos Santos, R. B. (1983). Mineral resources in the coastal area of Region II. Bureau of Mines and Geo-Sciences.

Chicago Style (17th ed.) Citation

Obra, Benjamin Q., Federico E. Miranda, and Rene B. Delos Santos. Mineral Resources in the Coastal Area of Region II. Baguio City: Bureau of Mines and Geo-Sciences, 1983.

MLA (9th ed.) Citation

Obra, Benjamin Q., et al. Mineral Resources in the Coastal Area of Region II. Bureau of Mines and Geo-Sciences, 1983.