Cita APA

Swan, M., & Baker, D. (2008). Grammar scan: Diagnostic tests for practical english usage (3a. ed.). Oxford University Press.

Citación estilo Chicago

Swan, Michael, and David Baker. Grammar Scan: Diagnostic Tests for Practical English Usage. 3a. ed. Oxford: Oxford University Press, 2008.

Cita MLA

Swan, Michael, and David Baker. Grammar Scan: Diagnostic Tests for Practical English Usage. 3a. ed. Oxford University Press, 2008.