Παραπομπή APA
Hafkamp, W. A. (1984). Economic-environmental modeling in a national-regional system: An operational approach with multi-layer projection. Amsterdam ; New York : New York, N.Y., U.S.A.: North-Holland.
Παραπομπή Chicago StyleHafkamp, Wilhelmus A. Economic-environmental Modeling in a National-regional System: An Operational Approach With Multi-layer Projection. Amsterdam ; New York : New York, N.Y., U.S.A.: North-Holland, 1984.
Παραπομπή MLAHafkamp, Wilhelmus A. Economic-environmental Modeling in a National-regional System: An Operational Approach With Multi-layer Projection. Amsterdam ; New York : New York, N.Y., U.S.A.: North-Holland, 1984.
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