Παραπομπή APA

Urry, S. (1991). An introduction to operational research: The best of everything. London: Longman Scientific Technical.

Παραπομπή Chicago Style

Urry, Syd. An Introduction to Operational Research: The Best of Everything. London: Longman Scientific Technical, 1991.

Παραπομπή MLA

Urry, Syd. An Introduction to Operational Research: The Best of Everything. London: Longman Scientific Technical, 1991.

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