APA (7th ed.) Citation

Halliday, M. A. K., & Webster, J. (2005). Studies in English language. Continuum.

Chicago Style (17th ed.) Citation

Halliday, M. A. K., and Jonathan Webster. Studies in English Language. London ; New York: Continuum, 2005.

MLA (9th ed.) Citation

Halliday, M. A. K., and Jonathan Webster. Studies in English Language. Continuum, 2005.