Impey, G., & Underhill, N. (1994). The ELT manager's handbook: Practical advice on managing a successful language school. Heinemann English Language Teaching.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रImpey, Graham, और Nic Underhill. The ELT Manager's Handbook: Practical Advice on Managing a Successful Language School. Oxford: Heinemann English Language Teaching, 1994.
एमएलए (8वां संस्करण) प्रशस्ति पत्रImpey, Graham, और Nic Underhill. The ELT Manager's Handbook: Practical Advice on Managing a Successful Language School. Heinemann English Language Teaching, 1994.
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