Gaya APA
Modern electronic communication. (2002).
New Delhi:
prentice-hall.
Gaya Chicago
Modern electronic communication.
7.
New Delhi:
prentice-hall,
2002.
Buku.
Gaya MLA
Modern electronic communication.
7.
New Delhi:
prentice-hall,
2002.
Buku.
Gaya Turabian
Modern electronic communication.
New Delhi:
prentice-hall,
2002.
Buku.