APA (7th ed.) Citation

Penrose, E. T. (1973). The economics of the international patent system (1951 Repr.). Greenwood Press.

Chicago Style (17th ed.) Citation

Penrose, Edith Tilton. The Economics of the International Patent System. 1951 Repr. Westport, Conn: Greenwood Press, 1973.

MLA (9th ed.) Citation

Penrose, Edith Tilton. The Economics of the International Patent System. 1951 Repr. Greenwood Press, 1973.