Cita APA (7a ed.)

Hartley, B., & Viney, P. Streamline english. departures: Workbook a units 1-40 (23a ed.).

Cita Chicago Style (17a ed.)

Hartley, Bernard, y Peter Viney. Streamline English. Departures: Workbook a Units 1-40. 23a ed.

Cita MLA (8a ed.)

Hartley, Bernard, y Peter Viney. Streamline English. Departures: Workbook a Units 1-40. 23a ed.