Lewis, C., & Hooper, W. (1982). Fern-seed and elephants: And other essays on christianity. Collins.
Lua i Stíl Chicago (17ú heag.)Lewis, C.S, agus Walter Hooper. Fern-seed and Elephants: And Other Essays on Christianity. Glasgow: Collins, 1982.
Lua MLA (9ú heag.)Lewis, C.S, agus Walter Hooper. Fern-seed and Elephants: And Other Essays on Christianity. Collins, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.