Langacker, R. W. (1991). Concept, image, and symbol: The cognitive basis of grammar. Mouton de Gruyter.
Citazione stile Chigago Style (17a edizione)Langacker, Ronald W.. Concept, Image, and Symbol: The Cognitive Basis of Grammar. Berlin ; New York: Mouton de Gruyter, 1991.
Citatione MLA (9a ed.)Langacker, Ronald W.. Concept, Image, and Symbol: The Cognitive Basis of Grammar. Mouton de Gruyter, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.