Gaya APA
RUBY BY EXAMPLE. (2007).
united states of America:
No Starch Press.
Gaya Chicago
RUBY BY EXAMPLE.
.
united states of America:
No Starch Press,
2007.
Text Book.
Gaya MLA
RUBY BY EXAMPLE.
.
united states of America:
No Starch Press,
2007.
Text Book.
Gaya Turabian
RUBY BY EXAMPLE.
united states of America:
No Starch Press,
2007.
Text Book.