Gaya APA
Udoyono, B.
(2012).
English Conversation for Customer Service and Sales Promotion Staff
(
1)
.
Yogyakarta:
Andi.
Gaya MLA
Udoyono, Bambang.
"English Conversation for Customer Service and Sales Promotion Staff".
1
Yogyakarta:
Andi,
2012.
Text.