Cita APA (7th ed.)

Dellar, H., & Walkley, A. (2017). Outcomes. Advanced class DVD-ROM. National Gaographic Learning Cengage Learning.

Cita Chicago (17th ed.)

Dellar, Hugh, i Andrew Walkley. Outcomes. Advanced Class DVD-ROM. United Kingdom: National Gaographic Learning Cengage Learning, 2017.

Cita MLA (9th ed.)

Dellar, Hugh, i Andrew Walkley. Outcomes. Advanced Class DVD-ROM. National Gaographic Learning Cengage Learning, 2017.