Brill's Encyclopedia of Hinduism (6 vols.) by 
Encyclopedia of Hinduism by The only bibliography I will list here is the Hinduism module in Oxford Bibliographies, a University of Washington database accessible from on campus there (only). "Module," I say, because it is actually a whole collection of extended annotated bibliographies on sub-topics within Hinduism:
Dizionario hindu-cristiano: luoghi per il diario interreligioso by 
The Routledge Handbook of Hindu-Christian Relations by 