Littlejohn, A. (1988). Company to company: A new approach to busines correspondence in english. Cambridge University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLittlejohn, Andrew. Company to Company: A New Approach to Busines Correspondence in English. Cambridge: Cambridge University, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLittlejohn, Andrew. Company to Company: A New Approach to Busines Correspondence in English. Cambridge University, 1988.
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