Hemphill, P. D., & McCormick, D. W. (1991). Business communications with writing improvement exercises (4th ed.). Regents/Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHemphill, Phyllis Davis, और Donald W. McCormick. Business Communications with Writing Improvement Exercises. 4th ed. Englewood Cliffs, NJ: Regents/Prentice-Hall, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHemphill, Phyllis Davis, और Donald W. McCormick. Business Communications with Writing Improvement Exercises. 4th ed. Regents/Prentice-Hall, 1991.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.