Robertson, Irvine. What cults believe / Irvine Robertson. - 4th ed. - Chicago : Moody Press, 1983. - 174 p. Includes bibliography. ISBN: 0802494110 Subjects--Uniform Titles: Subjects--Topical Terms: Christian sects--United States.Cults--United States. LC Class. No.: BL 2530 / .U6 / R62