Gaya APA
Norton, Peter. (1987).
The Norton Utilities version 4.01 (Cet. 1).
U.S.A.:
Peter Norton Computing.
Gaya Chicago
Norton, Peter.
The Norton Utilities version 4.01.
Cet. 1
U.S.A.:
Peter Norton Computing,
1987.
Text.
Gaya MLA
Norton, Peter.
The Norton Utilities version 4.01.
Cet. 1
U.S.A.:
Peter Norton Computing,
1987.
Text.
Gaya Turabian
Norton, Peter.
The Norton Utilities version 4.01.
Cet. 1
U.S.A.:
Peter Norton Computing,
1987.
Print.