Cita APA (7th ed.)

Dellar, H., & Walkley, A. (2016). Outcomes: Pre.Intermediate Class DVD-ROM. National Geographic Learning Cengage Learning.

Cita Chicago (17th ed.)

Dellar, Hugh, i Andrew Walkley. Outcomes: Pre.Intermediate Class DVD-ROM. United Kingdom: National Geographic Learning Cengage Learning, 2016.

Cita MLA (9th ed.)

Dellar, Hugh, i Andrew Walkley. Outcomes: Pre.Intermediate Class DVD-ROM. National Geographic Learning Cengage Learning, 2016.