Não informado. (1957). Business Horizons. Indiana University, School of Business.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Business Horizons. Bloomington, Ind: Indiana University, School of Business, 1957.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Business Horizons. Indiana University, School of Business, 1957.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.