Cita APA (7a ed.)

Quirk, R., & Greenbaum, S. (1993). A University Grammar of English (27th impression.). Longman.

Cita Chicago Style (17a ed.)

Quirk, Randolph, y Sidney Greenbaum. A University Grammar of English. 27th impression. Harlow: Longman, 1993.

Cita MLA (9a ed.)

Quirk, Randolph, y Sidney Greenbaum. A University Grammar of English. 27th impression. Longman, 1993.