Encylopedia of Religion, 2nd ed. Considered a standard source in the field with a cross-cultural approach.
Encyclopedia Judaica, 2nd ed. A major resource for scholarly articles on Judaism and Jewish life.
Encyclopedia of American Religions, 7th ed. "Comprehensive coverage of more than 2,300 North American religious groups in the U.S. and Canada."
Encyclopedia of Islam and the Muslim World, 2004 "This encyclopedia looks at Islam's role in the modern world, doing so in the context of the religion's history and development over the last 13 centuries."
Encyclopedia of Philosophy, 2nd ed. The standard source for the subject of Philosophy in English.
New Catholic Encyclopedia, 2nd ed. Along with its supplements, covers theology, philosophy, history, literary figures, saints, musicians and much more.
Brill Dictionary of Religion, 2006 Addresses religion as an element of daily life and public discourse.