Greer, T. H., & Lewis, G. (1992). A brief history of the Western world (6th.ed.). HBJ.
Lua i Stíl Chicago (17ú heag.)Greer, Thomas H., agus Gavin Lewis. A Brief History of the Western World. 6th.ed. Fort Worth: HBJ, 1992.
Lua MLA (9ú heag.)Greer, Thomas H., agus Gavin Lewis. A Brief History of the Western World. 6th.ed. HBJ, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.