Cita APA (7a ed.)

Tabor C. Carol. (2010). Natural English. Elementary: Workbook. New York, Oxford University Press, 2010.

Cita Chicago Style (17a ed.)

Tabor C. Carol. Natural English. Elementary: Workbook. New York, Oxford University Press, 2010, 2010.

Cita MLA (9a ed.)

Tabor C. Carol. Natural English. Elementary: Workbook. New York, Oxford University Press, 2010, 2010.