APA (7th ed.) Citation

Butt, J., Benjamin, C., & Rodrâiguez, A. M. (2019). A new reference grammar of modern Spanish (6th edition.). Routledge.

Chicago Style (17th ed.) Citation

Butt, John, Carmen Benjamin, and Antonia Moreira Rodrâiguez. A New Reference Grammar of Modern Spanish. 6th edition. London, New York: Routledge, 2019.

MLA (9th ed.) Citation

Butt, John, et al. A New Reference Grammar of Modern Spanish. 6th edition. Routledge, 2019.