Nuttall, C., & Evans, D. (2016). Pre-intermediate outcomes: Workbook (second edition.). National Geographic Learning Cengage Learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNuttall, Carol, और David Evans. Pre-intermediate Outcomes: Workbook. second edition. Hampshire: National Geographic Learning Cengage Learning, 2016.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNuttall, Carol, और David Evans. Pre-intermediate Outcomes: Workbook. second edition. National Geographic Learning Cengage Learning, 2016.
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