Não informado. (1974). Explorations in economic research. National Bureau of Economic Research.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Explorations in Economic Research. New York: National Bureau of Economic Research, 1974.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Explorations in Economic Research. National Bureau of Economic Research, 1974.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.