HUBBARD, Hilton. An Introduction to Functional Grammar, by M. A. K. Halliday. English Usage in Southern Africa, [S. l.], v. 20, n. 2, p. 69–73, 2018. Disponível em: https://www.unisapressjournals.co.za/index.php/EUSA/article/view/5144. Acesso em: 18 dec. 2025.