Cornwall, I., & Illustrations by Howard, M. M. (1968). Prehistoric animals and their hunters. Faber and Faber.
Lua i Stíl Chicago (17ú heag.)Cornwall, I.W, agus M. M. Illustrations by Howard. Prehistoric Animals and Their Hunters. London: Faber and Faber, 1968.
Lua MLA (9ú heag.)Cornwall, I.W, agus M. M. Illustrations by Howard. Prehistoric Animals and Their Hunters. Faber and Faber, 1968.
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