Gaya APA
Achmad, D, G. et al (2012).
Increasing the service quality for customer satisfaction .
Surabaya:
PPPM STIE Perbanas.
Gaya MLA
Achmad, DAENGS, GS,. et al.
"Increasing the service quality for customer satisfaction".
Surabaya:
PPPM STIE Perbanas,
2012.
Artikel.