APA (7th ed.) Citation

Freksa, C. (1992). Using orientation information for qualitative spatial reasoning. GKK.

Chicago Style (17th ed.) Citation

Freksa, Christian. Using Orientation Information for Qualitative Spatial Reasoning. Hamburg: GKK, 1992.

MLA (9th ed.) Citation

Freksa, Christian. Using Orientation Information for Qualitative Spatial Reasoning. GKK, 1992.

Warning: These citations may not always be 100% accurate.