APA (7th ed.) Citation

Butt, J., & Benjamin, C. (2004). A new reference grammar of modern Spanish (4th ed.). Hodder Arnold.

Chicago Style (17th ed.) Citation

Butt, John, and Carmen Benjamin. A New Reference Grammar of Modern Spanish. 4th ed. London: Hodder Arnold, 2004.

MLA (9th ed.) Citation

Butt, John, and Carmen Benjamin. A New Reference Grammar of Modern Spanish. 4th ed. Hodder Arnold, 2004.