Geffner, A. B. (2004). Business English: A complete guide to developing an effective business writing style (4th ed.). Barron's Educational Series.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGeffner, Andrea B. Business English: A Complete Guide to Developing an Effective Business Writing Style. 4th ed. Hauppauge, N.Y: Barron's Educational Series, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGeffner, Andrea B. Business English: A Complete Guide to Developing an Effective Business Writing Style. 4th ed. Barron's Educational Series, 2004.
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