Gaya APA
Customer Service: Building Succesful Skills for the Twenty-first Century. (2005).
Boston:
Mc Graw Hill.
Gaya Chicago
Customer Service: Building Succesful Skills for the Twenty-first Century.
3th.
Boston:
Mc Graw Hill,
2005.
Buku.
Gaya MLA
Customer Service: Building Succesful Skills for the Twenty-first Century.
3th.
Boston:
Mc Graw Hill,
2005.
Buku.
Gaya Turabian
Customer Service: Building Succesful Skills for the Twenty-first Century.
Boston:
Mc Graw Hill,
2005.
Buku.