APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Obra, Benjamin Q., Rene B. De los Santos, and Federico E. Miranda. 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.