APA (7th ed.) Citation

Obee B & V. Evans. (2003). Upstream: Upper intermediate B 2+,Student's book. Наука.

Chicago Style (17th ed.) Citation

Obee B and V. Evans. Upstream: Upper Intermediate B 2+,Student's Book. Express publishing: Наука, 2003.

MLA (8th ed.) Citation

Obee B and V. Evans. Upstream: Upper Intermediate B 2+,Student's Book. Наука, 2003.