(1985). Prehistoric life. Time-Life Books.
Lua i Stíl Chicago (17ú heag.)Prehistoric Life. Hong Kong: Time-Life Books, 1985.
Lua MLA (9ú heag.)Prehistoric Life. Time-Life Books, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.