Gaya APA
Riordan, R.
(2009).
Percy Jackson and The Olympians The Demigod Files
(
1)
.
New York:
Disnep . Hiperion books.
Gaya MLA
Riordan, Rick.
"Percy Jackson and The Olympians The Demigod Files".
1
New York:
Disnep . Hiperion books,
2009.
Texs.