APA (7th ed.) Citation

Naterop, B. J., Weis, E., & Haberfellner, E. (1977). Business letters for all. Oxford University Press.

Chicago Style (17th ed.) Citation

Naterop, Bertha J., Erich Weis, and Eva Haberfellner. Business Letters for All. Kuala Lumpur: Oxford University Press, 1977.

MLA (9th ed.) Citation

Naterop, Bertha J., et al. Business Letters for All. Oxford University Press, 1977.