1. Alawiyah, F. M., & Cahyono, E. D. (2018). Persepsi petani terhadap introduksi inovasi agens hayati melalui kombinasi media demplot dan FFD. Jurnal Ekonomi Pertanian dan Agribisnis, 2(1), 19–28.
2. Almekinders, C. J. M, Louwaars, N. P., & de Bruijn, G. H. (1994). Local seed system and their importance for an improved seed supply in developing countries. Euphytica, 78(3), 2007–216.
3. Bentley, J. W., & Vasques, D. (1998). The seed potato system in Bolivia: Organisational growth and missing links. London: ODI. Retrieved from https://www.odi.org/sites/odi.org.uk/files/odi-assets/publications-opinion-files/5154.pdf
4. Bessette, G. & Rajasunderam, C. V. (Eds.) (1996). Participatory development communication: A West African agenda. Ottawa: IDRC.
5. Boon, K. F. (2009). A Critical history of change in agricultural extension and considerations for future policies and programs. (Doctoral Dissertation, University of Adelaide).