Cita APA (7a ed.)

Quirk, R., & Greenbaum, S. (1973). A university grammar of english. Longman.

Cita Chicago Style (17a ed.)

Quirk, Randolph, y Sidney Greenbaum. A University Grammar of English. London: Longman, 1973.

Cita MLA (8a ed.)

Quirk, Randolph, y Sidney Greenbaum. A University Grammar of English. Longman, 1973.