Cita APA (7a ed.)

Quirk, R., Greenbaum, S., Leech, G., & Svartvik, J. (1972). A GRAMMAR of contemporary English. Longman.

Cita Chicago Style (17a ed.)

Quirk, Randolph, Sidney Greenbaum, Geoffrey Leech, y Jan Svartvik. A GRAMMAR of Contemporary English. London: Longman, 1972.

Cita MLA (8a ed.)

Quirk, Randolph, et al. A GRAMMAR of Contemporary English. Longman, 1972.