Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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