Gaya APA
William B. Martin, Ph.D. (2005).
Quality Customer Service .
Jakarta:
PPm.
Gaya Chicago
William B. Martin, Ph.D.
Quality Customer Service.
Jakarta:
PPm,
2005.
Text.
Gaya MLA
William B. Martin, Ph.D.
Quality Customer Service.
Jakarta:
PPm,
2005.
Text.
Gaya Turabian
William B. Martin, Ph.D.
Quality Customer Service.
Jakarta:
PPm,
2005.
Print.