APA (7th ed.) Citation

Wittenberg, M. A., & Voiles, P. R. (1979). Modern business English: A text-workbook for colleges. Gregg.

Chicago Style (17th ed.) Citation

Wittenberg, Mary A., and Price R. Voiles. Modern Business English: A Text-workbook for Colleges. New York: Gregg, 1979.

MLA (9th ed.) Citation

Wittenberg, Mary A., and Price R. Voiles. Modern Business English: A Text-workbook for Colleges. Gregg, 1979.