Não informado. (1961). Operations Research/Management Science. Executive Sciences Institute.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Operations Research/Management Science. Davenport, Iowa: Executive Sciences Institute, 1961.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Operations Research/Management Science. Executive Sciences Institute, 1961.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.