Não informado. (1961). Operations Research/Management Science. Executive Sciences Institute.
Chicago-referens (17:e uppl.)Não informado. Operations Research/Management Science. Davenport, Iowa: Executive Sciences Institute, 1961.
MLA-referens (8:e uppl.)Não informado. Operations Research/Management Science. Executive Sciences Institute, 1961.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.