Gaya APA
Ahern, Cecelia. (2010).
The Book of tomorrow .
New York:
HarperCollins.
Gaya Chicago
Ahern, Cecelia.
The Book of tomorrow.
New York:
HarperCollins,
2010.
Text.
Gaya MLA
Ahern, Cecelia.
The Book of tomorrow.
New York:
HarperCollins,
2010.
Text.
Gaya Turabian
Ahern, Cecelia.
The Book of tomorrow.
New York:
HarperCollins,
2010.
Print.