Kessler, J., Lenzing, A., & Liebner, M. (2016). Developing, modelling and assessing second languages. John Benjamins Publishing Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKessler, Jorg-U, Anke Lenzing, और Mathias Liebner. Developing, Modelling and Assessing Second Languages. Amsterdam, [Netherlands] ; Philadelphia, [Pennsylvania]: John Benjamins Publishing Company, 2016.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKessler, Jorg-U, et al. Developing, Modelling and Assessing Second Languages. John Benjamins Publishing Company, 2016.
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