Cita APA (7a ed.)
Naterop, B. J., Weis, E., & Haberfellner, E. (1991). Business Letters for All (19.impression.). Oxford University Press.
Cita Chicago Style (17a ed.)
Naterop, Bertha J., Erich Weis, y Eva Haberfellner. Business Letters for All. 19.impression. Oxford: Oxford University Press, 1991.
Cita MLA (9a ed.)
Naterop, Bertha J., et al. Business Letters for All. 19.impression. Oxford University Press, 1991.
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