Penrose, E. T. (1951). The economics of the international patent system. Johns Hopkins Press.
Chicagoスタイル(17版)引用形式Penrose, Edith Tilton. The Economics of the International Patent System. Baltimore: Johns Hopkins Press, 1951.
MLA(8版)引用形式Penrose, Edith Tilton. The Economics of the International Patent System. Johns Hopkins Press, 1951.
警告: この引用は必ずしも正確ではありません.