Cita APA (7th ed.)

Doff A. Adrian & Jones Ch. Christopher. (1997). Language in use. Pre-intermediate: Self-Study Workbook with answer key. Cambridge, Cambridge University Press, 1997.

Cita Chicago (17th ed.)

Doff A. Adrian i Jones Ch. Christopher. Language in Use. Pre-intermediate: Self-Study Workbook with Answer Key. Cambridge, Cambridge University Press, 1997, 1997.

Cita MLA (9th ed.)

Doff A. Adrian i Jones Ch. Christopher. Language in Use. Pre-intermediate: Self-Study Workbook with Answer Key. Cambridge, Cambridge University Press, 1997, 1997.