Defining Cults:

Merriam-Webster Definition of a Cult

What is a Cult? -- Christian Research Institute

What Are Some of the Common Marks of the Cults? -- Christian Research Institute

What Is a Cult? by Bob and Gretchen Passantino

Cult or Cultic? -- Watchman Fellowship

Patterns in the Cults -- Watchman Fellowship

Alan Gomes’s Definition

What Is a Cult? by John Moorehead

A Cult Recipe, by Kenneth Samples, Erwin de Castro, Richard Abanes, and Robert Lyle

Understanding Cultic Growth:

Adherents.com (a web site that provides the statistical size of numerous religious groups)

Why the Cults are Growing -- Watchman Fellowship

Mormon Growth Rate -- Watchman Fellowship

Cults:

Christian Science

Jehovah's Witnesses

Mormonism

Seventh-Day Adventism

Cult Research Sites:

American Family Foundation Cults Information

Apologia Report

Christian Apologetics and Research Ministry

Christian Research and Evangelism

Is the Roman Catholic Church Christian? - by Rob Caines

Islam

Jehovah's Witnesses

Ankerburg theological research Institute - John Ankerburg

Personal Freedom Outreach - M. Kurt Goedelman

Probe Ministries

Reveal

Saints Alive - Ed Decker

Watchman Fellowshi

The Mind Sciences

The New Age Movement

The Church of Scientology

Hindu-Based Cults

The Unification Church

The Baha'i Faith

Unitarian Universalism

Oneness Pentecostalism

Freemasonry

Satanism