APA aipamena

Naterop, B. J., Haberfellner, E., & Weis, E. (1998). Business letters for all. New York: Oxford University press.

Chicago Style aipamena

Naterop, Bertha J., Eva Haberfellner, và Erich Weis. Business Letters for All. New York: Oxford University press, 1998.

MLA aipamena

Naterop, Bertha J., Eva Haberfellner, và Erich Weis. Business Letters for All. New York: Oxford University press, 1998.