Gaya APA
william b. martin, ph.d. (2005).
quality customer service (1).
Jakarta:
penerbit ppm.
Gaya Chicago
william b. martin, ph.d.
quality customer service.
1
Jakarta:
penerbit ppm,
2005.
Text.
Gaya MLA
william b. martin, ph.d.
quality customer service.
1
Jakarta:
penerbit ppm,
2005.
Text.
Gaya Turabian
william b. martin, ph.d.
quality customer service.
1
Jakarta:
penerbit ppm,
2005.
Print.