Παραπομπή APA

Reichardt, H. (1971). Optimization problems in planning theory. Athens: Center of Planning and Economic Research.

Παραπομπή Chicago Style

Reichardt, Helmut. Optimization Problems in Planning Theory. Athens: Center of Planning and Economic Research, 1971.

Παραπομπή MLA

Reichardt, Helmut. Optimization Problems in Planning Theory. Athens: Center of Planning and Economic Research, 1971.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.