APA (7th ed.) Citation

Walker, J. A. (2010). Variation in linguistic systems. Routledge.

Chicago Style (17th ed.) Citation

Walker, James A. Variation in Linguistic Systems. New York, NY: Routledge, 2010.

MLA (9th ed.) Citation

Walker, James A. Variation in Linguistic Systems. Routledge, 2010.

Warning: These citations may not always be 100% accurate.