Gaya APA
BELLAMY, John. (1991).
Digital telephony (Ed. 2).
New York:
John Wiley @@ Sons.
Gaya Chicago
BELLAMY, John.
Digital telephony.
Ed. 2
New York:
John Wiley @@ Sons,
1991.
Text.
Gaya MLA
BELLAMY, John.
Digital telephony.
Ed. 2
New York:
John Wiley @@ Sons,
1991.
Text.
Gaya Turabian
BELLAMY, John.
Digital telephony.
Ed. 2
New York:
John Wiley @@ Sons,
1991.
Print.