Não informado. (1957). Business Horizons. Indiana University, School of Business.
Chicago-referens (17:e uppl.)Não informado. Business Horizons. Bloomington, Ind: Indiana University, School of Business, 1957.
MLA-referens (8:e uppl.)Não informado. Business Horizons. Indiana University, School of Business, 1957.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.