Vettorel, P. (2015). New frontiers in teaching and learning English. Cambridge Scholars Publishing.
Lua i Stíl Chicago (17ú heag.)Vettorel, Paola. New Frontiers in Teaching and Learning English. Newcastle upon Tyne, England: Cambridge Scholars Publishing, 2015.
Lua MLA (9ú heag.)Vettorel, Paola. New Frontiers in Teaching and Learning English. Cambridge Scholars Publishing, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.