Gaya APA
Pilkey, D. (2006).
Captain Underpants and The Preposterous Plight of The Purple Potty People .
London, UK:
Scholastic.
Gaya MLA
Pilkey, Dav.
"Captain Underpants and The Preposterous Plight of The Purple Potty People".
London, UK:
Scholastic,
2006.
Text.