Gaya APA
BOVEE, C, L. et al (2003).
Business Communication today (7th ed.).
Upper Saddle River, New Jersey:
Prentice Hall International.
Gaya MLA
BOVEE, Courtland, L.. et al.
"Business Communication today".
7th ed.
Upper Saddle River, New Jersey:
Prentice Hall International,
2003.
Buku.