Soars, L. &. J. (2019). Headway: Beginner teacher's guide/ (Fifth edition.). Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Soars, Liz & John. Headway: Beginner Teacher's Guide/. Fifth edition. UK: Oxford University Press, 2019.
Lua MLA (9ú heag.)Soars, Liz & John. Headway: Beginner Teacher's Guide/. Fifth edition. Oxford University Press, 2019.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.