Cita APA

Carter, R., McCarthy, M., Mark, G., & O'Keeffe, A. (2011). English Grammar Today: Workbook. Cambridge: Cambridge University Press.

Citación estilo Chicago

Carter, Ronald, Michael McCarthy, Geraldine Mark, and Anne O'Keeffe. English Grammar Today: Workbook. Cambridge: Cambridge University Press, 2011.

Cita MLA

Carter, Ronald, Michael McCarthy, Geraldine Mark, and Anne O'Keeffe. English Grammar Today: Workbook. Cambridge: Cambridge University Press, 2011.