Gaya APA
INDRAJIT, R, E.
(2016).
Elektronic Commerce:
(
Ed. 2)
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Yogyakarta:
Preinexus TM .
Gaya MLA
INDRAJIT, Richardus, Eko.
"Elektronic Commerce:".
Ed. 2
Yogyakarta:
Preinexus TM ,
2016.
Buku.