Heine, B., & Kuteva, T. (2002). World Lexicon of grammaticalization. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Heine, Bernd, agus Tania Kuteva. World Lexicon of Grammaticalization. New York, N.Y., USA: Cambridge University Press, 2002.
Lua MLA (9ú heag.)Heine, Bernd, agus Tania Kuteva. World Lexicon of Grammaticalization. Cambridge University Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.