1. Agung, A. A. G. (2005). Bali endangered paradise? Tri Hita Karana and the conservation of the Island’s biocultural diversity. Ph.D. Dissertation. Leiden Ethnosystems and Development Programme. LEAD Studies No. 1. Leiden University. xxv + ill., p. 463.
2. Ambaretnani, P. (2012). Paraji and Bidan in Rancaekek: Integrated medicine for advanced partnerships among traditional birth attendants and community midwives in the Sunda Area of West Java, Indonesia. Ph.D. Dissertation. Leiden Ethnosystems and Development Programme. LEAD Studies No. 7. Leiden University. xx + ill., p. 265.
3. Baland, J. M., Bonjean, L., Guirkinger, C., & Ziparo, R. (2016). The economic consequences of mutual help in extended families. Journal of Development Economics, 123(2016), 38–56.
4. Ball, R. (2001). Individualism, Collectivism, and Economic Development. Annals of the American Academy of Political and Social Science, 573, 57–84. Culture and Development: International Perspectives (January 2001).
5. Banfield, E. C. (1958). The moral basis of a backward society. New York: The Free Press.