APA Style
Riordan, Rick. (2015).
Heroes Of Olympus The Mark Of Athena .
United Kingdom:
Puffin Books.
Chicago Style
Riordan, Rick.
Heroes Of Olympus The Mark Of Athena.
United Kingdom:
Puffin Books,
2015.
Text.
MLA Style
Riordan, Rick.
Heroes Of Olympus The Mark Of Athena.
United Kingdom:
Puffin Books,
2015.
Text.
Turabian Style
Riordan, Rick.
Heroes Of Olympus The Mark Of Athena.
United Kingdom:
Puffin Books,
2015.
Print.