Ginsburgh, V., & Weber, S. (2011). How many languages do we really need?: The economics of linguistic diversity. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Ginsburgh, Victor, agus Shlomo Weber. How Many Languages Do We Really Need?: The Economics of Linguistic Diversity. Princeton, N.J.: Princeton University Press, 2011.
Lua MLA (9ú heag.)Ginsburgh, Victor, agus Shlomo Weber. How Many Languages Do We Really Need?: The Economics of Linguistic Diversity. Princeton University Press, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.