Cita APA (7a ed.)

Quirk, R. (1991). A grammar of contemporary English (1st published, 19th impression.). Longman.

Cita Chicago Style (17a ed.)

Quirk, Randolph. A Grammar of Contemporary English. 1st published, 19th impression. Harlow: Longman, 1991.

Cita MLA (9a ed.)

Quirk, Randolph. A Grammar of Contemporary English. 1st published, 19th impression. Longman, 1991.