Steiner, K. G. (1987). On-farm experimentation handbook for rural development projects: Guidelines for the development of ecological and socio-economic sound extension messages for small farmers. GTZ.
Chicago-Zitierstil (17. Ausg.)Steiner, Kurt G. On-farm Experimentation Handbook for Rural Development Projects: Guidelines for the Development of Ecological and Socio-economic Sound Extension Messages for Small Farmers. Eschborn: GTZ, 1987.
MLA-Zitierstil (9. Ausg.)Steiner, Kurt G. On-farm Experimentation Handbook for Rural Development Projects: Guidelines for the Development of Ecological and Socio-economic Sound Extension Messages for Small Farmers. GTZ, 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.