1. Barclay, W. (1951). The letters to the Philippians, Colossians, and Thessalonians. Saint Andrews Press.
2. Bauer, W., Danker, F., Arndt, W., & Gingrich, F. (1979). A Greek-English lexicon of the new testament and other early Christian literature. University of Chicago Press.
3. Best, E. (1972). The first and second epistles to the Thessalonians. Harper & Row Publishers.
4. Blanchard, K. (2002). Reflections on encourage the heart. In J. Kouzes & B. Posner (Eds.), Christian reflections on leadership challenge. Jossey-Bass.
5. Blanchard, K., & Hodges, P. (1984). P Lead Like Jesus. Thomas Nelson.