1. Adhiguru P, Birthal PS, Kumar BG (2009) Strengthening pluralistic agricultural information delivery systems in India. Agric Econ Res Rev 22:71–79
2. Anderson JR, Feder G (2004) Agricultural extension: good intentions and hard realities. World Bank Res Obs 19(1):41–60
3. Badan Penyuluhan dan Pengembangan Sumber Daya Manusia Pertanian (BP2SDMP) (2013) Data penyuluh pertanian swadaya sampai dengan Juli 2011. Department of Agriculture, Indonesia. http://cybex.deptan.go.id/page/penyuluh-swadaya
4. Beer J, Ibrahim M, Sinclair F (2005) The history and future of agroforestry research and development: policy impacts and needs. In: Mery G, Alfaro R, Kanninen M, Lobovikov M (eds) Forests in the global balance—changing paradigms, vol 17. IUFRO World Series, Helsinki, p 318
5. Feder G, Savastano S (2006) The role of opinion leaders in the diffusion of new knowledge: the case of integrated pest management. World Dev 34(7):1287–1300