1. Amir, P. and Hawkins, R. Methods of on-farm research. Proceedings of an International Workshop. March13–171989, Puncak, Bogor, Indonesia. Developments in Procedures for Farming Systems Research, Edited by: Sukmana, S., Amir, P. and Mulyadi, D.M. pp.68–93. Indonesia: AARD. In
2. Systems approaches to agricultural development: The Hawkesbury experience
3. ACIAR Proceedings No 11;Bawden R.J.,1985