APA (7th ed.) Citation

Riordan, R. (2019). Hotel Valhalla. Noura Books.

Chicago Style (17th ed.) Citation

Riordan, Rick. Hotel Valhalla. Noura Books, 2019.

MLA (8th ed.) Citation

Riordan, Rick. Hotel Valhalla. Noura Books, 2019.

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