Gaya APA

Locker, K, O., Kaczmarek, S, K. (2014). Business communication : building critical skills (Ed. VI). New York: Mc Graw-Hill.

Gaya MLA

Locker, Kitty, O.., Kaczmarek, Stephen, Kyo. "Business communication : building critical skills". Ed. VI New York: Mc Graw-Hill, 2014. Text.