Gaya APA
Margretta. (2012).
Understanding michael porter .
Yogyakarta:
.
Gaya Chicago
Margretta.
Understanding michael porter.
Yogyakarta:
,
2012.
Text.
Gaya MLA
Margretta.
Understanding michael porter.
Yogyakarta:
,
2012.
Text.
Gaya Turabian
Margretta.
Understanding michael porter.
Yogyakarta:
,
2012.
Print.