(1990). An enhanced digital line graph design: A feature-based data model for digital spatial data bases that represent geographic phenomenon. U.S. Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)An Enhanced Digital Line Graph Design: A Feature-based Data Model for Digital Spatial Data Bases That Represent Geographic Phenomenon. [Washington]: U.S. Gov. Print. Off, 1990.
MLA-Zitierstil (9. Ausg.)An Enhanced Digital Line Graph Design: A Feature-based Data Model for Digital Spatial Data Bases That Represent Geographic Phenomenon. U.S. Gov. Print. Off, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.