Cita APA (7th ed.)

Quirk, R. (1974). A Grammar of contemporary English. Longman.

Cita Chicago (17th ed.)

Quirk, Randolph. A Grammar of Contemporary English. London: Longman, 1974.

Cita MLA (9th ed.)

Quirk, Randolph. A Grammar of Contemporary English. Longman, 1974.