Gaya APA
Negus. (2007).
Ubuntu linux toolbox .
UNITED STATES OF AMERICA:
Wiley.
Gaya Chicago
Negus.
Ubuntu linux toolbox.
UNITED STATES OF AMERICA:
Wiley,
2007.
Text.
Gaya MLA
Negus.
Ubuntu linux toolbox.
UNITED STATES OF AMERICA:
Wiley,
2007.
Text.
Gaya Turabian
Negus.
Ubuntu linux toolbox.
UNITED STATES OF AMERICA:
Wiley,
2007.
Print.