Halliday, M., & Hasan, R. (1976). Cohesion in English. Longman.
Lua i Stíl Chicago (17ú heag.)Halliday, M.A.K., agus Ruqaiya Hasan. Cohesion in English. London: Longman, 1976.
Lua MLA (9ú heag.)Halliday, M.A.K., agus Ruqaiya Hasan. Cohesion in English. Longman, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.