APA (7th ed.) Citation
Langacker, R. W. (1987). Foundations of cognitive grammar. Stanford University Press.
Chicago Style (17th ed.) Citation
Langacker, Ronald W. Foundations of Cognitive Grammar. Stanford, California: Stanford University Press, 1987.
MLA (9th ed.) Citation
Langacker, Ronald W. Foundations of Cognitive Grammar. Stanford University Press, 1987.
Warning: These citations may not always be 100% accurate.