linsel, H., & sack, K. (1965). theoretical problems of industrial planning. National Planning Institute.
Cita Chicago (17th ed.)linsel, H., i K. sack. Theoretical Problems of Industrial Planning. cairo: National Planning Institute, 1965.
Cita MLA (9th ed.)linsel, H., i K. sack. Theoretical Problems of Industrial Planning. National Planning Institute, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.