Gaya APA

Udoyono, Bambang. (2012). English conversation for customer service and sales promotion staff . : Andi Offset.

Gaya Chicago

Udoyono, Bambang. English conversation for customer service and sales promotion staff. : Andi Offset, 2012. Text.

Gaya MLA

Udoyono, Bambang. English conversation for customer service and sales promotion staff. : Andi Offset, 2012. Text.

Gaya Turabian

Udoyono, Bambang. English conversation for customer service and sales promotion staff. : Andi Offset, 2012. Print.