Cita APA (7a ed.)

Naterop, B. J., Haberfellner, E., & Weis, E. (1983). Business letters for all ([8th imp.].). Oxford University Press.

Cita Chicago Style (17a ed.)

Naterop, Bertha Jean, Eva Haberfellner, y Erich Weis. Business Letters for All. [8th imp.]. Kuala Lumpur: Oxford University Press, 1983.

Cita MLA (9a ed.)

Naterop, Bertha Jean, et al. Business Letters for All. [8th imp.]. Oxford University Press, 1983.