Gaya APA
History of posts and telecommunications in Indonesia vol IV. (1982).
Jakarta:
.
Gaya Chicago
History of posts and telecommunications in Indonesia vol IV.
.
Jakarta:
,
1982.
Buku.
Gaya MLA
History of posts and telecommunications in Indonesia vol IV.
.
Jakarta:
,
1982.
Buku.
Gaya Turabian
History of posts and telecommunications in Indonesia vol IV.
Jakarta:
,
1982.
Buku.