APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.