Grenville, J. A. S. (2005). A history of the world from the 20th to the 21st century. Routledge.
Lua i Stíl Chicago (17ú heag.)Grenville, J. A. S. A History of the World from the 20th to the 21st Century. London: Routledge, 2005.
Lua MLA (9ú heag.)Grenville, J. A. S. A History of the World from the 20th to the 21st Century. Routledge, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.