Gaya APA
Riordan, R.
(2019).
The heroes of Olympus III: The Mark of Athena
(
edisi 1)
.
New York:
Disneybooks.com.
Gaya MLA
Riordan, Rick.
"The heroes of Olympus III: The Mark of Athena".
edisi 1
New York:
Disneybooks.com,
2019.
Text.