APA Style
Bush, Stanley E, Parsons, Charles R. (1993).
Private Branch Exchange Systems and Applications .
New York:
McGraw-Hill.
Chicago Style
Bush, Stanley E, Parsons, Charles R.
Private Branch Exchange Systems and Applications.
New York:
McGraw-Hill,
1993.
Text.
MLA Style
Bush, Stanley E, Parsons, Charles R.
Private Branch Exchange Systems and Applications.
New York:
McGraw-Hill,
1993.
Text.
Turabian Style
Bush, Stanley E, Parsons, Charles R.
Private Branch Exchange Systems and Applications.
New York:
McGraw-Hill,
1993.
Print.