George E. Ladd, A Commentary on the Revelation of John (Grand Rapids, MI: Eerdmans, 1972), p.7; J. Benton White, From Adam to Armageddon: A Survey of the Bible (Belmont, CA: Wadsworth, 1986), p. 170; David A. deSilva, “The Social Setting of the Revelation of John: Conflicts Within, Fears Without,” Westminster Theological Journal 54 (1992), pp. 302–320; Bruce M. Metzger and Roland E. Murphy, eds., The New Oxford Annotated Bible, New Revised Standard Version (New York: Oxford Univ. Press, 1994), p. 363 NT; Robert H. Mounce, Book of Revelation (Grand Rapids, MI: Eerdmans, 1998), pp. 8–21.