Evans V. Virginia & Dooley J. Jenny. (2006). Upstream. Intermediate B2: Workbook. Student's Book (3rd ed.). Newbury, Express Publishing, 2006.
Chicago-viite (17. p.)Evans V. Virginia ja Dooley J. Jenny. Upstream. Intermediate B2: Workbook. Student's Book. 3rd ed. Newbury, Express Publishing, 2006, 2006.
MLA-viite (9. p.)Evans V. Virginia ja Dooley J. Jenny. Upstream. Intermediate B2: Workbook. Student's Book. 3rd ed. Newbury, Express Publishing, 2006, 2006.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.