Παραπομπή σε μορφή APA (7η εκδ.)

Hultgren, T. (1965). Cost, prices, and profits, their cyclical relations. National Bureau of Economic Research.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hultgren, Thor. Cost, Prices, and Profits, Their Cyclical Relations. New York: National Bureau of Economic Research, 1965.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hultgren, Thor. Cost, Prices, and Profits, Their Cyclical Relations. National Bureau of Economic Research, 1965.