Ussher, A. (1947). Descartes and the malignant demon.
Lua i Stíl Chicago (17ú heag.)Ussher, Arland. Descartes and the Malignant Demon. 1947.
Lua MLA (9ú heag.)Ussher, Arland. Descartes and the Malignant Demon. 1947.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
