The Christian Apologetics & Research Ministry provides a continually-updated dictionary of terms associated with theology.

The New Testament Gateway is a directory of online resources on the New Testament. Mark Goodacre, an associate professor of religious studies at Duke University, is creator and editor of the site.

Written by James Keith Elliott (Oxford University Press, 2005). Elliott provides translations and background on recently discovered apocryphal texts.

Published by P.J. Kenedy & Sons. The Official Catholic Directory is a guide to Catholic clergy in the United States and around the world.

Written by Alban Butler and Paul Burns (Liturgical Press, 1999). Butler and Burns write a revised guide to the history of the Catholic patron saints.

Published by Our Sunday Visitor (2012). The Catholic Almanac is a directory of Catholicism in the U.S. It is updated annually.

The Evangelical Press Association seeks to promote the cause of evangelical Christianity and to enhance the influence of Christian journalism. It is based in Colorado Springs, Colo.

The Evangelical Christian Publishers Association is an international non-profit trade organization comprised of member companies that are involved in the publishing and distribution of Christian content worldwide. Contact through the website.

The Episcopal Communicator is a self-supporting organization of persons with communication responsibilities in The Episcopal Church.