Cita APA (7a ed.)

Quirk, R., Greenbaum, S., & Close, R. (1979). A university grammar of english: Workbook. Longman.

Cita Chicago Style (17a ed.)

Quirk, Randolph, Sidney Greenbaum, y R.A Close. A University Grammar of English: Workbook. London: Longman, 1979.

Cita MLA (8a ed.)

Quirk, Randolph, et al. A University Grammar of English: Workbook. Longman, 1979.