Brock, S. L. (1996). Better business writing: Techniques for improving correspondence (3rd ed.). Crisp Publication.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBrock, Susan L. Better Business Writing: Techniques for Improving Correspondence. 3rd ed. California: Crisp Publication, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBrock, Susan L. Better Business Writing: Techniques for Improving Correspondence. 3rd ed. Crisp Publication, 1996.
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