Gaya APA
Purbo, Onno W. (2007).
VOIP Cikal Bakal Telkom Rakyat .
Jakarta:
Gramedia.
Gaya Chicago
Purbo, Onno W.
VOIP Cikal Bakal Telkom Rakyat.
Jakarta:
Gramedia,
2007.
.
Gaya MLA
Purbo, Onno W.
VOIP Cikal Bakal Telkom Rakyat.
Jakarta:
Gramedia,
2007.
.
Gaya Turabian
Purbo, Onno W.
VOIP Cikal Bakal Telkom Rakyat.
Jakarta:
Gramedia,
2007.
.