APA (7th ed.) Citation

Walton, R. Advanced English C.A.E. grammar practice. Longman.

Chicago Style (17th ed.) Citation

Walton, Richard. Advanced English C.A.E. Grammar Practice. London: Longman.

MLA (9th ed.) Citation

Walton, Richard. Advanced English C.A.E. Grammar Practice. Longman.

Warning: These citations may not always be 100% accurate.