Cita APA (7th ed.)

Crystal, D., & Quirk, R. (1985). A Comprehensive grammar of the English language. Longman.

Cita Chicago (17th ed.)

Crystal, David, i Randolph Quirk. A Comprehensive Grammar of the English Language. London: Longman, 1985.

Cita MLA (9th ed.)

Crystal, David, i Randolph Quirk. A Comprehensive Grammar of the English Language. Longman, 1985.