Chambers, R., Pacey, A., & Thrupp, L. A. (1989). Farmer first: Farmer innovation and agricultural research. Intermediate Technology Publications.
Chicago-viite (17. p.)Chambers, Robert, Arnold Pacey, ja Lori Ann Thrupp. Farmer First: Farmer Innovation and Agricultural Research. London: Intermediate Technology Publications, 1989.
MLA-viite (8. p.)Chambers, Robert, et al. Farmer First: Farmer Innovation and Agricultural Research. Intermediate Technology Publications, 1989.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.