Gaya APA
Electronic Commerce. (2000).
Singapore:
The McGraw Hill Companies.
Gaya Chicago
Electronic Commerce.
.
Singapore:
The McGraw Hill Companies,
2000.
Text.
Gaya MLA
Electronic Commerce.
.
Singapore:
The McGraw Hill Companies,
2000.
Text.
Gaya Turabian
Electronic Commerce.
Singapore:
The McGraw Hill Companies,
2000.
Print.