Gaya APA
william B.Martin,Pj.D.. (2004).
Quality customer service .
Jakarta:
PPM.
Gaya Chicago
william B.Martin,Pj.D..
Quality customer service.
Jakarta:
PPM,
2004.
Text.
Gaya MLA
william B.Martin,Pj.D..
Quality customer service.
Jakarta:
PPM,
2004.
Text.
Gaya Turabian
william B.Martin,Pj.D..
Quality customer service.
Jakarta:
PPM,
2004.
Print.