Gaya APA
Romero. (2010).
Virtual box 3.1 .
UNITED KINGDOM:
PACKT.
Gaya Chicago
Romero.
Virtual box 3.1.
UNITED KINGDOM:
PACKT,
2010.
Text.
Gaya MLA
Romero.
Virtual box 3.1.
UNITED KINGDOM:
PACKT,
2010.
Text.
Gaya Turabian
Romero.
Virtual box 3.1.
UNITED KINGDOM:
PACKT,
2010.
Print.