Online Reference Books

General

Funk & Wagnalls New World Encyclopedia

Oxford English Dictionary Online

NetLibrary  

Religion 

Calvin Commentaries

Contemporary American Religion

Encyclopaedia Judaica

Encyclopedia of Islam and the Muslim World

Encyclopedia of Religion

Encyclopedia of Science and Religion

Westminster Dictionary of Christian Ethics

Westminster Dictionary of Theological Terms

Business

Gale Market Share Reporter

Education

Encyclopedia of Education

History

African Historical Dictionaries

Berkshire Encyclopedia of World History

Encyclopedia of India 

Intercultural

Cities of the World

Countries and Their Cultures

Country Profiles - Library of Congress

Encyclopedia of Islam and the Muslim World

Gale Encyclopedia of Multicultural America  

Literature

Reference Guide to World Literature

Music

Dictionary of North American Hymnology

New Grove Dictionary of Music and Musicians

Philosophy

Oxford Dictionary of Philosophy

Standford Encyclopedia of Philosophy 

Psychology

Encyclopedia of Multicultural Psychology

Gale Encyclopedia of Psychology

International Encyclopedia of Marriage and Family

Science

Encyclopedia of Science and Religion

Encyclopedia of Science, Technology, and Ethics 

Gale Encyclopedia of Medicine

Medicine, Health, and Bioethics: Essential Primary Sources