1. Aune, David E. (2006). Apocalypticism, Prophecy and Magic in Early Christianity, Mohr Siebeck. Wissenschaftliche Untersuchungen zum Neuen Testament 199.
2. Axelrod, Robert (1984). The Evolution of Cooperation, Basic Books.
3. Bauckham, Richard (1993). The Theology of the Book of Revelation, Cambridge University Press. New Testament Theology.
4. Marshall, I. Howard, and Hagner, Donald A. (1999). The Book of Revelation: A Commentary on the Greek Text, Eerdmans. The New International Greek Testament Commentary.
5. Boring, M. Eugene (1989). Revelation: Interpretation: A Bible Commentary for Teaching and Preaching, John Knox.