APA (7th ed.) Citation

Walker, J. A. (2010). Aspect in grammatical variation. John Benjamins Pub. Co..

Chicago Style (17th ed.) Citation

Walker, James A. Aspect in Grammatical Variation. Amsterdam ; Philadelphia: John Benjamins Pub. Co., 2010.

MLA (8th ed.) Citation

Walker, James A. Aspect in Grammatical Variation. John Benjamins Pub. Co., 2010.

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