Beilby, M. H. (1975). Economics and operational research. ELSEVIER.
Cita Chicago (17th ed.)Beilby, M. H. Economics and Operational Research. ELSEVIER, 1975.
Cita MLA (8th ed.)Beilby, M. H. Economics and Operational Research. ELSEVIER, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.