(1981). Civilization Past & Present Vol. 2 T. Walter Wallbank...[et.al.]. Scott, Foresman and Company.
Lua i Stíl Chicago (17ú heag.)Civilization Past & Present Vol. 2 T. Walter Wallbank...[et.al.]. Scott, Foresman and Company, 1981.
Lua MLA (8ú heag.)Civilization Past & Present Vol. 2 T. Walter Wallbank...[et.al.]. Scott, Foresman and Company, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.