APA (7th ed.) Citation

Naterop, B. J., Haberfellner, E., & Weis, E. (1984). Business letters for all (Ninth Impression.). Oxford University.

Chicago Style (17th ed.) Citation

Naterop, Bertha J., Eva Haberfellner, and Erich Weis. Business Letters for All. Ninth Impression. London: Oxford University, 1984.

MLA (9th ed.) Citation

Naterop, Bertha J., et al. Business Letters for All. Ninth Impression. Oxford University, 1984.