APA-viite (7. p.)
Lewis, C., & Hooper, W. Fern-Seed and Elephants: And Other Essays on Christianity. Fount.
Chicago-viite (17. p.)
Lewis, C.S, ja Walter Hooper. Fern-Seed and Elephants: And Other Essays on Christianity. Glasgow, Escocia: Fount.
MLA-viite (9. p.)
Lewis, C.S, ja Walter Hooper. Fern-Seed and Elephants: And Other Essays on Christianity. Fount.
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