Não informado. (1965). Business Economics. National Association of Business Economists.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Business Economics. Cleveland, Ohio: National Association of Business Economists, 1965.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Business Economics. National Association of Business Economists, 1965.
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