Gaya APA

Locker, K, O, L, K, O. (2007). Business communication : building critical skill.-- (Ed. 3.--). America: McGraw-Hill.

Gaya MLA

Locker, Kitty, O., Locker,, Kitty, O.. "Business communication : building critical skill.--". Ed. 3.-- America: McGraw-Hill, 2007. Buku.