Cita APA (7th ed.)

Riordan, R. (2016). Hotel Valhalla guide to the Norse worlds: An official Magnus Chase companion book. Puffin.

Cita Chicago (17th ed.)

Riordan, Rick. Hotel Valhalla Guide to the Norse Worlds: An Official Magnus Chase Companion Book. London: Puffin, 2016.

Cita MLA (8th ed.)

Riordan, Rick. Hotel Valhalla Guide to the Norse Worlds: An Official Magnus Chase Companion Book. Puffin, 2016.