Citazione APA

Ferber, R., & Verdoorn, P. (1962). Research methods in economics and business. Macmillan company.

Stile di citazione Chicago

Ferber, Robert, e P.J Verdoorn. Research Methods in Economics and Business. London: Macmillan company, 1962.

Citazione MLA

Ferber, Robert, e P.J Verdoorn. Research Methods in Economics and Business. Macmillan company, 1962.