APA (7th ed.) Citation

Geological Survey (U.S.), Ambroziak, R. A., & Schruben, P. G. (1996). Geology and resource assessment of Costa Rica at 1:500,000 scale: A digital representation of maps of the U.S. Geological Survey's 1987 folio I-1865. The Survey ; For sale by the USGS Information Services.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Russell A. Ambroziak, and Paul G. Schruben. Geology and Resource Assessment of Costa Rica at 1:500,000 Scale: A Digital Representation of Maps of the U.S. Geological Survey's 1987 Folio I-1865. Reston, VA : Denver, CO: The Survey ; For sale by the USGS Information Services, 1996.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geology and Resource Assessment of Costa Rica at 1:500,000 Scale: A Digital Representation of Maps of the U.S. Geological Survey's 1987 Folio I-1865. The Survey ; For sale by the USGS Information Services, 1996.