APA (7th ed.) Citation

Boyko, K. J., & Guptill, S. C. (1990). An Enhanced digital line graph design: A feature-based data model for digital spatial data bases that represent geographic phenomenon. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Boyko, Kenneth J., and Stephen C. Guptill. An Enhanced Digital Line Graph Design: A Feature-based Data Model for Digital Spatial Data Bases That Represent Geographic Phenomenon. [Reston, Virginia]: Department of the Interior, U.S. Geological Survey, 1990.

MLA (9th ed.) Citation

Boyko, Kenneth J., and Stephen C. Guptill. An Enhanced Digital Line Graph Design: A Feature-based Data Model for Digital Spatial Data Bases That Represent Geographic Phenomenon. Department of the Interior, U.S. Geological Survey, 1990.