Alston, W. P., & Nakhnikian, G. (1963). Readings in twentieth-century philosophy. Free Press of Glencoe.
Lua i Stíl Chicago (17ú heag.)Alston, William P., agus George Nakhnikian. Readings in Twentieth-century Philosophy. [New York]: Free Press of Glencoe, 1963.
Lua MLA (9ú heag.)Alston, William P., agus George Nakhnikian. Readings in Twentieth-century Philosophy. Free Press of Glencoe, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.