Before revision: The idea of language as a 'system ' appears in the linguistic theory of Ferdinand de Saussure, J.R. Firth, Benjamin Lee Whorf, Louis Hjelmslev, and Michael Halliday.
After revision: The idea of language as a linguistic system appears in the linguistic theory of Ferdinand de Saussure, J.R. Firth, Benjamin Lee Whorf, Louis Hjelmslev, and Michael Halliday.