Cita APA (7th ed.)

Hewings, M. (1999). Advanced grammar in use: A self-study reference and practice book for advanced learners of English: with answers. Cambridge University.

Cita Chicago (17th ed.)

Hewings, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English: With Answers. Nueva York: Cambridge University, 1999.

Cita MLA (9th ed.)

Hewings, Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English: With Answers. Cambridge University, 1999.