Gaya APA
Bocker, P. (1988).
ISDN : The Integrated Services Digita Network : Concepts, Methods, Systems .
New York:
Springer-Verlag.
Gaya MLA
Bocker, Peter.
"ISDN : The Integrated Services Digita Network : Concepts, Methods, Systems".
New York:
Springer-Verlag,
1988.
.