Riordan, R. (2016). Hotel Valhalla guide to the Norse worlds: An official Magnus Chase companion book. Puffin.
芝加哥风格引文Riordan, Rick. Hotel Valhalla Guide to the Norse Worlds: An Official Magnus Chase Companion Book. London: Puffin, 2016.
MLA引文Riordan, Rick. Hotel Valhalla Guide to the Norse Worlds: An Official Magnus Chase Companion Book. Puffin, 2016.
警告：这些引文格式不一定是100％准确.