Dyfyniad APA

Penrose, E. T. (1951). The economics of the international patent system. Johns Hopkins Press.

Dyfyniad Arddull Chicago

Penrose, Edith Tilton. The Economics of the International Patent System. Baltimore: Johns Hopkins Press, 1951.

Dyfyniad MLA

Penrose, Edith Tilton. The Economics of the International Patent System. Johns Hopkins Press, 1951.

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