Coba jelasin Sekunder dari Dhammacakkappavattana Sutta dong

Gombrich, Richard (1988, repr. 2002). Theravada Buddhism: A Social History from Ancient Benares to Modern Colombo. London: Routledge. .

Norman, K.R. (1982). "The Four Noble Truths: a problem of Pali syntax" in L.A. Hercus et al. (ed.), Indological and Buddhist Studies: Volume in Honour of Professor J.W. de Jong on his Sixtieth Birthday. Canberra, pp. 377–91.