Many of the entries in the dictionaries and encyclopedias listed here will conclude with starter-bibliographies on the topic in question, for example the starter-bibliography to the entry on Modern Confucianism in the Stanford Encyclopedia of Philosophy, below. But see also Oxford Bibliographies (at the University of Washington), below.
Conceptual Lexicon for Classical Confucian Philosophy by 
RoutledgeCurzon Encyclopedia of Confucianism (2 vols.) by 
Encyclopedia of Chinese Philosophy by 
Encyclopedia of Asian Philosophy by 
Routledge Encyclopedia of Traditional Chinese Culture by 
Stanford Encyclopedia of Philosophy
Routledge Encyclopedia of Philosophy by 
Internet Encyclopedia of Philosophy by 
Religion Past and Present. Ed. Betz, Browning, Janowski, & Jüngel. 14 vols.
Encyclopedia of Religion. 2nd ed. Ed. Jones. 15 vols.
Merriam-Webster's Encyclopedia of World Religions by 
Oxford Bibliographies
The Oxford Handbook of Confucianism by 
A Concise Companion to Confucius by 
Companion Encyclopedia of Asian Philosophy by