Langacker, R. W. (1991). Concept, image, and symbol: The cognitive basis of grammar. Mouton de Gruyter.
Lua i Stíl Chicago (17ú heag.)Langacker, Ronald W. Concept, Image, and Symbol: The Cognitive Basis of Grammar. Berlin ; New York: Mouton de Gruyter, 1991.
Lua MLA (9ú heag.)Langacker, Ronald W. Concept, Image, and Symbol: The Cognitive Basis of Grammar. Mouton de Gruyter, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.