Jay I. Kislak Reference Collection (Library of Congress). (1973). Early man in America: Readings from Scientific American, with an introduction. W. H. Freeman.
Lua i Stíl Chicago (17ú heag.)Jay I. Kislak Reference Collection (Library of Congress). Early Man in America: Readings from Scientific American, with an Introduction. San Francisco: W. H. Freeman, 1973.
Lua MLA (9ú heag.)Jay I. Kislak Reference Collection (Library of Congress). Early Man in America: Readings from Scientific American, with an Introduction. W. H. Freeman, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.