APA

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

Chicago

Hultgren Thor, . 1965. Cost, prices, and profits: their cyclical relations. N.y: National Bureau of Economic Research.

Harvard

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

MLA

Hultgren Thor, . Cost, prices, and profits: their cyclical relations. N.y: National Bureau of Economic Research. 1965.