Leonard, J. N. (1970). Ancient America. Time-Life International.
Lua i Stíl Chicago (17ú heag.)Leonard, Jonathan Norton. Ancient America. Nederland, NV: Time-Life International, 1970.
Lua MLA (9ú heag.)Leonard, Jonathan Norton. Ancient America. Time-Life International, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.