John Reynolds. (2013). Cambridge Checkpoint English Workbook 1 ("New, Workbook".). Hodder Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohn Reynolds. Cambridge Checkpoint English Workbook 1. "New, Workbook". Hodder Education, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रJohn Reynolds. Cambridge Checkpoint English Workbook 1. "New, Workbook". Hodder Education, 2013.
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