APA (7th ed.) Citation

Halliday, M. A. K., & Hasan, R. (1991). Language, context, and text: Aspects of language in a social-semiotic perspective (3rd imp.). Oxford University Press.

Chicago Style (17th ed.) Citation

Halliday, M. A. K., and Ruqaiya Hasan. Language, Context, and Text: Aspects of Language in a Social-semiotic Perspective. 3rd imp. Oxford [etc.]: Oxford University Press, 1991.

MLA (9th ed.) Citation

Halliday, M. A. K., and Ruqaiya Hasan. Language, Context, and Text: Aspects of Language in a Social-semiotic Perspective. 3rd imp. Oxford University Press, 1991.