Walter, C., & Swan, M. The Cambridge english course: Practice book 2.
Lua i Stíl Chicago (17ú heag.)Walter, Catherine, agus Michael Swan. The Cambridge English Course: Practice Book 2.
Lua MLA (8ú heag.)Walter, Catherine, agus Michael Swan. The Cambridge English Course: Practice Book 2.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.