APA-viite (7. p.)

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-viite (17. p.)

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

MLA-viite (9. p.)

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