Gaya APA
Quible, Z, K. et al
(1996).
Business communication
(
ed. International )
.
:
Prentice Hall.Singapura.
Gaya MLA
Quible, Zane, K.. et al.
"Business communication ".
ed. International
:
Prentice Hall.Singapura,
1996.
Koleksi World Bank.