Παραπομπή APA
Siemens, N., Marting, C., & Greenwood, F. (1973). Operations research: Planning,operating,and Information systems. New York: The Free press.
Παραπομπή Chicago StyleSiemens, Nikolai., C.H Marting, and Frank Greenwood. Operations Research: Planning,operating,and Information Systems. New York: The Free press, 1973.
Παραπομπή MLASiemens, Nikolai., C.H Marting, and Frank Greenwood. Operations Research: Planning,operating,and Information Systems. New York: The Free press, 1973.
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