Cita APA

Gude, K., Duckworth, M., & Halliwell, H. (2007). Top score: Student's book 3. Oxford: Oxford University Press.

Citación estilo Chicago

Gude, Kathy, Michael Duckworth, y Helen Halliwell. Top Score: Student's Book 3. Oxford: Oxford University Press, 2007.

Cita MLA

Gude, Kathy, Michael Duckworth, y Helen Halliwell. Top Score: Student's Book 3. Oxford: Oxford University Press, 2007.