Gaya APA
Indrajit, R, E.
(2016).
Electronic Commerce Edisi 2
(
2)
.
Yogyakarta:
Preinexus.
Gaya MLA
Indrajit, Richardaus, Eko.
"Electronic Commerce Edisi 2".
2
Yogyakarta:
Preinexus,
2016.
Text.