Knowles, D. (1966). What is mysticismn. Burns & Oates.
Lua i Stíl Chicago (17ú heag.)Knowles, David. What Is Mysticismn. London: Burns & Oates, 1966.
Lua MLA (9ú heag.)Knowles, David. What Is Mysticismn. Burns & Oates, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.