frisch, r. (1963). investment requirements under a given time shape of current final demand. National Planning Institute.
Чикаго стиль цитування (17-те видання)frisch, ragnar. Investment Requirements Under a Given Time Shape of Current Final Demand. cairo: National Planning Institute, 1963.
Стиль цитування MLA (9-ме видання)frisch, ragnar. Investment Requirements Under a Given Time Shape of Current Final Demand. National Planning Institute, 1963.