Cita APA (7th ed.)

Langacker, R. W. (2013). Essentials of cognitive grammar. Oxford University Press.

Cita Chicago (17th ed.)

Langacker, Ronald W. Essentials of Cognitive Grammar. New York: Oxford University Press, 2013.

Cita MLA (9th ed.)

Langacker, Ronald W. Essentials of Cognitive Grammar. Oxford University Press, 2013.