Cita APA (7a ed.)

Evans, V., & Dooley, J. (2013). Upstream: Proficiency C2. Workbook, student's (2nd impression.). Express Publishing.

Cita Chicago Style (17a ed.)

Evans, Virginia, y Jenny Dooley. Upstream: Proficiency C2. Workbook, Student's. 2nd impression. Newbury: Express Publishing, 2013.

Cita MLA (9a ed.)

Evans, Virginia, y Jenny Dooley. Upstream: Proficiency C2. Workbook, Student's. 2nd impression. Express Publishing, 2013.