Sandars, N. K. (1968). Prehistoric art in Europe. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Sandars, N. K. Prehistoric Art in Europe. Baltimore: Penguin Books, 1968.
Lua MLA (9ú heag.)Sandars, N. K. Prehistoric Art in Europe. Penguin Books, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.