Παραπομπή APA

Great Britain. National Coal Board., & Houlden, B. T. (1968). Some techniques of Operational research ([1st ed.] 3rd impression.). London: English Universities P..

Παραπομπή Chicago Style

Great Britain. National Coal Board., and Brian Thomas Houlden. Some Techniques of Operational Research. [1st ed.] 3rd impression. London: English Universities P., 1968.

Παραπομπή MLA

Great Britain. National Coal Board., and Brian Thomas Houlden. Some Techniques of Operational Research. [1st ed.] 3rd impression. London: English Universities P., 1968.

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