1. Bodhi, B. (2010). The guardians of the world. Access to Insight (BCBS Edition). http://www.accesstoinsight.org/lib/authors/bodhi/bps-essay_23.html. Accessed 1 May 2021.
2. Bodhi, B. (Trans.). (2012). The numerical discourses of the Buddha: A translation of the Aṅguttara Nikaya (The Teachings of the Buddha). Wisdom Publications.
3. Bodhi, B. (Trans.). (n.d.). Aṅguttara Nikāya. https://obo.genaud.net/dhamma-vinaya/wp/an/05_fives/an05.002.bodh.wp.htm. Accessed 1 May 2021.
4. Kalupahana, D. J. (1975). Causality: The central philosophy of Buddhism. The University Press of Hawaii.
5. Mahendra, A. (Trans.). (2018). Itivuttakapāḷi—Book of this was said. Dhamma Publishers.