APA (7e ed.) Bronvermelding

Foley, M., & Hall, D. (2003). Longman. Advanced learners' grammar: A self-study reference & practice book with answers. Pearson Education Limited.

Chicago (17e ed.) Bronvermelding

Foley, Mark, en Diane Hall. Longman. Advanced Learners' Grammar: A Self-study Reference & Practice Book with Answers. Essex: Pearson Education Limited, 2003.

MLA (9e ed.) Bronvermelding

Foley, Mark, en Diane Hall. Longman. Advanced Learners' Grammar: A Self-study Reference & Practice Book with Answers. Pearson Education Limited, 2003.