APA (7th ed.) Citation

Price, H. H. (1940). Humes's theory of the external world. Oxford University.

Chicago Style (17th ed.) Citation

Price, H. H. Humes's Theory of the External World. Londres: Oxford University, 1940.

MLA (9th ed.) Citation

Price, H. H. Humes's Theory of the External World. Oxford University, 1940.