APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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