Foley, M., & Hall, D. (2003). Longman. Advanced learners' grammar: A self-study reference & practice book with answers. Pearson Education Limited.
Lua i Stíl Chicago (17ú heag.)Foley, Mark, agus Diane Hall. Longman. Advanced Learners' Grammar: A Self-study Reference & Practice Book with Answers. Essex: Pearson Education Limited, 2003.
Lua MLA (9ú heag.)Foley, Mark, agus Diane Hall. Longman. Advanced Learners' Grammar: A Self-study Reference & Practice Book with Answers. Pearson Education Limited, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.