Moseley, Ch.; Asher, R.E. (ed.), 1994, Atlas of the world's languages, Londres / New York: Routledge. GI-01; GI-03; GI-19; BI-03; AR-01; MA-02; PA-05 Gako-hitzak: Atlasak; Hizkuntzak [Munduko -]; Munduko hizkuntzak
Koerner, E.F.K.; Asher, R.E. (ed.), 1995, Concise history of the language sciences. From the Sumerians to the Cognitivists, Oxford: Pergamon Press. GI-03; GI-05; GI-19; BI-03; MA-02 Gako-hitzak: Hizkuntzalaritza