John Reynolds. (2013). Cambridge Checkpoint English Workbook 1 ("New, Workbook".). Hodder Education.
Cita Chicago (17th ed.)John Reynolds. Cambridge Checkpoint English Workbook 1. "New, Workbook". Hodder Education, 2013.
Cita MLA (9th ed.)John Reynolds. Cambridge Checkpoint English Workbook 1. "New, Workbook". Hodder Education, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.