Lewis, C. S. (1961). A preface to Paradise lost. Oxford University Press; AITBS.
Lua i Stíl Chicago (17ú heag.)Lewis, C. S. A Preface to Paradise Lost. London ; New York; New Delhi: Oxford University Press; AITBS, 1961.
Lua MLA (8ú heag.)Lewis, C. S. A Preface to Paradise Lost. Oxford University Press; AITBS, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.