APA (7th ed.) Zitazioa
Langacker, R. W. (1987). Foundations of cognitive grammar. Stanford University Press.
Chicago Style (17th ed.) Zitazioa
Langacker, Ronald W. Foundations of Cognitive Grammar. Stanford, California: Stanford University Press, 1987.
MLA (9th ed.) Zitazioa
Langacker, Ronald W. Foundations of Cognitive Grammar. Stanford University Press, 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.