APA (7th ed.) Citation

Halliday, M. A. K. (1985). An introduction to functional grammar. E. Arnold.

Chicago Style (17th ed.) Citation

Halliday, M. A. K. An Introduction to Functional Grammar. London ; Baltimore, Md., USA: E. Arnold, 1985.

MLA (9th ed.) Citation

Halliday, M. A. K. An Introduction to Functional Grammar. E. Arnold, 1985.