Cita APA (7a ed.)

Quirk, R. (1972). A grammar of contemporary English. Longman.

Cita Chicago Style (17a ed.)

Quirk, Randolph. A Grammar of Contemporary English. Harlow: Longman, 1972.

Cita MLA (9a ed.)

Quirk, Randolph. A Grammar of Contemporary English. Longman, 1972.