Gaya APA
Electronic communication systems. (2002).
New Delhi:
prentice-hall.
Gaya Chicago
Electronic communication systems.
4.
New Delhi:
prentice-hall,
2002.
Buku.
Gaya MLA
Electronic communication systems.
4.
New Delhi:
prentice-hall,
2002.
Buku.
Gaya Turabian
Electronic communication systems.
New Delhi:
prentice-hall,
2002.
Buku.