Soars, L., Soars, J., & Hancock, P. (2019). Headway: Pre-Intermediate - Student's Book. Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSoars, Liz, John Soars, और Paul Hancock. Headway: Pre-Intermediate - Student's Book. Oxford, Unites Kingdom: Oxford University Press, 2019.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSoars, Liz, et al. Headway: Pre-Intermediate - Student's Book. Oxford University Press, 2019.
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