Gaya APA
Helmke, Matthew. (2017).
The Official Ubuntu Book (9).
USA:
Prentige Hall.
Gaya Chicago
Helmke, Matthew.
The Official Ubuntu Book.
9
USA:
Prentige Hall,
2017.
Text.
Gaya MLA
Helmke, Matthew.
The Official Ubuntu Book.
9
USA:
Prentige Hall,
2017.
Text.
Gaya Turabian
Helmke, Matthew.
The Official Ubuntu Book.
9
USA:
Prentige Hall,
2017.
Print.