APA (7th ed.) Citation

Salkie, R., Busuttil, P., & Auwera, J. v. d. (2009). Modality in English: Theory and description. M. de Gruyter.

Chicago Style (17th ed.) Citation

Salkie, Raphael, Pierre Busuttil, and Johan van der Auwera. Modality in English: Theory and Description. Berlin ; New York: M. de Gruyter, 2009.

MLA (8th ed.) Citation

Salkie, Raphael, et al. Modality in English: Theory and Description. M. de Gruyter, 2009.