Cita APA (7th ed.)

Gude, K., & Kathy Gude. (2000). Advanced listening and speaking: CAE (New edition.). Oxford University Press.

Cita Chicago (17th ed.)

Gude, Kathy, i Kathy Gude. Advanced Listening and Speaking: CAE. New edition. Oxford: Oxford University Press, 2000.

Cita MLA (8th ed.)

Gude, Kathy, i Kathy Gude. Advanced Listening and Speaking: CAE. New edition. Oxford University Press, 2000.