APA (7th ed.) Citation

Price, H. H. (1981). Hume's theory of the external world. Greenwood Press.

Chicago Style (17th ed.) Citation

Price, H. H. Hume's Theory of the External World. Westport, Conn.: Greenwood Press, 1981.

MLA (9th ed.) Citation

Price, H. H. Hume's Theory of the External World. Greenwood Press, 1981.