APA (7th ed.) Citation

Downing, A., & Locke, P. (2002). A university course in English grammar. Routledge.

Chicago Style (17th ed.) Citation

Downing, Angela, and Philip Locke. A University Course in English Grammar. London: Routledge, 2002.

MLA (8th ed.) Citation

Downing, Angela, and Philip Locke. A University Course in English Grammar. Routledge, 2002.