Should I Be Adding References To A Fantasy Novel?

Hiya, I'm planning on writing a fantasy series set in a fictional world. The setting will be loosely based on the feudal system of late medieval early Tudor Europe. I'm going to be doing research because what I know about the feudal system is surface-level pertaining to History A-Level and also into common food and production of goods such as clothes. After all this research should I be including references at the end of the novel?