APA (7th ed.) Citation

Hafkamp, W. A. (1984). Economic-environmental modeling in a national-regional system: An operational approach with multi-layer projection. North-Holland.

Chicago Style (17th ed.) Citation

Hafkamp, Wilhelms A. Economic-environmental Modeling in a National-regional System: An Operational Approach with Multi-layer Projection. New York: North-Holland, 1984.

MLA (9th ed.) Citation

Hafkamp, Wilhelms A. Economic-environmental Modeling in a National-regional System: An Operational Approach with Multi-layer Projection. North-Holland, 1984.