Gaya APA
Birney, Betty G. (2005).
The world according to humphrey .
New York:
Puffin.
Gaya Chicago
Birney, Betty G.
The world according to humphrey.
New York:
Puffin,
2005.
Text.
Gaya MLA
Birney, Betty G.
The world according to humphrey.
New York:
Puffin,
2005.
Text.
Gaya Turabian
Birney, Betty G.
The world according to humphrey.
New York:
Puffin,
2005.
Print.