Cita APA (7th ed.)

Evans V. Virginia & Dooley J. Jenny. (2006). Upstream. Intermediate B2: Student s Book. Newbury, Express Publishing, 2006.

Cita Chicago (17th ed.)

Evans V. Virginia i Dooley J. Jenny. Upstream. Intermediate B2: Student S Book. Newbury, Express Publishing, 2006, 2006.

Cita MLA (9th ed.)

Evans V. Virginia i Dooley J. Jenny. Upstream. Intermediate B2: Student S Book. Newbury, Express Publishing, 2006, 2006.