Gaya APA

Hildebrandt, H, W., A, M. (). Effective Business Communications (4th.ed). New York: McGraw-Hill Book Company6c1984.

Gaya MLA

Hildebrandt, Herbert, W.., A, MURPHY,Herta. "Effective Business Communications". 4th.ed New York: McGraw-Hill Book Company6c1984, . Teks.