APA (7th ed.) Citation

Riordan, R. (2019). The Trials of Apollo #4: The Tyrant's Tomb. Noura Books.

Chicago Style (17th ed.) Citation

Riordan, Rick. The Trials of Apollo #4: The Tyrant's Tomb. Noura Books, 2019.

MLA (8th ed.) Citation

Riordan, Rick. The Trials of Apollo #4: The Tyrant's Tomb. Noura Books, 2019.

Warning: These citations may not always be 100% accurate.