Gaya APA
william b. martin, ph.d. (2001).
quality customer service (1).
Jakarta:
PT ppm.
Gaya Chicago
william b. martin, ph.d.
quality customer service.
1
Jakarta:
PT ppm,
2001.
Text.
Gaya MLA
william b. martin, ph.d.
quality customer service.
1
Jakarta:
PT ppm,
2001.
Text.
Gaya Turabian
william b. martin, ph.d.
quality customer service.
1
Jakarta:
PT ppm,
2001.
Print.