Style de citation APA (7e éd.)

Obee B. Bob & Evans V. Virginia. (2010). Upstream. Upper Intermediate B2+: Student's Book. Newbury, Express Publishing, 2010.

Style de citation Chicago (17e éd.)

Obee B. Bob et Evans V. Virginia. Upstream. Upper Intermediate B2+: Student's Book. Newbury, Express Publishing, 2010, 2010.

Style de citation MLA (9e éd.)

Obee B. Bob et Evans V. Virginia. Upstream. Upper Intermediate B2+: Student's Book. Newbury, Express Publishing, 2010, 2010.

Attention : ces citations peuvent ne pas être correctes à 100%.