Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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