REFERENCES
- Hasan, Ruqaiya. 2019. Linguistic sign and the science of linguistics. In Jonathan J. Webster and Carmel Cloran (eds.), Describing language: Form and function. Volume 5 of the collected works of Ruqaiya Hasan, 51–79. Sheffield/Bristol: Equinox.
- Webster, Jonathan J. (ed.). 2013. Halliday in the 21st century. Volume 11 of the collected works of M.A.K. Halliday. London/New York: Bloomsbury.