[1]Locke, T. (2010).Beyond the grammar wars a resource for teachers and students on developing language knowledge in the English/
literacy classroom. London: Routledge.
[2]Halliday, M.A.K., and Christian M. I. M. Matthiessen. An Introduction to Functional Grammar. Arnold, 2004.
[3]Thompson, Geoff. Introducing Functional Grammar. Routledge, 2014.