Gaya APA
Umar, Husein. (2003).
Business an introduction .
Jakarta:
Gramedia.
Gaya Chicago
Umar, Husein.
Business an introduction.
Jakarta:
Gramedia,
2003.
Text.
Gaya MLA
Umar, Husein.
Business an introduction.
Jakarta:
Gramedia,
2003.
Text.
Gaya Turabian
Umar, Husein.
Business an introduction.
Jakarta:
Gramedia,
2003.
Print.