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