Oxenden C. Clive, Latham-Koenig Ch. Christina, & Seligson P. Paul. (2007). New English File. Pre-Intermediate: Student's Book. New York, Oxford University Press, 2007.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOxenden C. Clive, Latham-Koenig Ch. Christina, और Seligson P. Paul. New English File. Pre-Intermediate: Student's Book. New York, Oxford University Press, 2007, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOxenden C. Clive, et al. New English File. Pre-Intermediate: Student's Book. New York, Oxford University Press, 2007, 2007.
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