Gaya APA
BOONE, L, E.
(1997).
Contemporary business communication
(
2, cet. 2)
.
Singapura:
Prentice Hall.
Gaya MLA
BOONE, Louis, E.
"Contemporary business communication".
2, cet. 2
Singapura:
Prentice Hall,
1997.
Buku.