Não informado. (1947). Business Education Forum. National Business Education Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Business Education Forum. Washington: National Business Education Association, 1947.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Business Education Forum. National Business Education Association, 1947.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.