Cita APA (7th ed.)

Dellar, H., & Walkley, A. (2010). Upper intermediate outcomes: Student´s book. Heinle, Cengage Learning EMEA.

Cita Chicago (17th ed.)

Dellar, Hugh, i Andrew Walkley. Upper Intermediate Outcomes: Student´s Book. Hampshire: Heinle, Cengage Learning EMEA, 2010.

Cita MLA (9th ed.)

Dellar, Hugh, i Andrew Walkley. Upper Intermediate Outcomes: Student´s Book. Heinle, Cengage Learning EMEA, 2010.