Gaya APA
Kessler,Gary C. (1993).
ISDN : Concepts, Facilities, and services (2nd, ed).
New York:
McGraw-Hill.
Gaya Chicago
Kessler,Gary C.
ISDN : Concepts, Facilities, and services.
2nd, ed
New York:
McGraw-Hill,
1993.
Text.
Gaya MLA
Kessler,Gary C.
ISDN : Concepts, Facilities, and services.
2nd, ed
New York:
McGraw-Hill,
1993.
Text.
Gaya Turabian
Kessler,Gary C.
ISDN : Concepts, Facilities, and services.
2nd, ed
New York:
McGraw-Hill,
1993.
Print.