Cita APA (7a ed.)

Stephens, M. (2009). Activate! B2 + workbook (3 ed.). Pearson Education.

Cita Chicago Style (17a ed.)

Stephens, Mary. Activate! B2 + Workbook. 3 ed. Oxford: Pearson Education, 2009.

Cita MLA (8a ed.)

Stephens, Mary. Activate! B2 + Workbook. 3 ed. Pearson Education, 2009.