APA (7th ed.) Citation

Walter, E., & Woodford, K. (2010). Collocations extra: Multi-level activities for natural English (1. publ.). Cambridge Univ. Press.

Chicago Style (17th ed.) Citation

Walter, Elizabeth, and Kate Woodford. Collocations Extra: Multi-level Activities for Natural English. 1. publ. Cambridge: Cambridge Univ. Press, 2010.

MLA (9th ed.) Citation

Walter, Elizabeth, and Kate Woodford. Collocations Extra: Multi-level Activities for Natural English. 1. publ. Cambridge Univ. Press, 2010.