Citazione Stile APA (7a Edizione)
(1981). Operational research '81: Proceedings of the 9. IFORS international conference on operational research. North-Holland Pub. Co.
Citazione stile Chigago Style (17a edizione)
Operational Research '81: Proceedings of the 9. IFORS International Conference on Operational Research. Amsterdam: North-Holland Pub. Co, 1981.
Citatione MLA (9a ed.)
Operational Research '81: Proceedings of the 9. IFORS International Conference on Operational Research. North-Holland Pub. Co, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.