Evans V. Virginia & Edwards L. Lynda. (2007). Upstream Advanced C1: Teacher's Book. Newbury, Express Publishing, 2007.
Citazione stile Chigago Style (17a edizione)Evans V. Virginia e Edwards L. Lynda. Upstream Advanced C1: Teacher's Book. Newbury, Express Publishing, 2007, 2007.
Citatione MLA (9a ed.)Evans V. Virginia e Edwards L. Lynda. Upstream Advanced C1: Teacher's Book. Newbury, Express Publishing, 2007, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.