Huxley, A. (1962). The perennial philosophy. Meridian Book.
Lua i Stíl Chicago (17ú heag.)Huxley, Aldous. The Perennial Philosophy. Cleveland, Ohio: Meridian Book, 1962.
Lua MLA (9ú heag.)Huxley, Aldous. The Perennial Philosophy. Meridian Book, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.