APA (7th ed.) Citation

Walls, Y. L., & Walls, J. W. (2009). Using Chinese: A guide to contemporary usage (1. publ.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Walls, Yvonne Li, and Jan W. Walls. Using Chinese: A Guide to Contemporary Usage. 1. publ. Cambridge [u.a.]: Cambridge University Press, 2009.

MLA (9th ed.) Citation

Walls, Yvonne Li, and Jan W. Walls. Using Chinese: A Guide to Contemporary Usage. 1. publ. Cambridge University Press, 2009.