1. (Agricultural Economics), Agricultural College, Bapatla, Acharya NG Ranga Agricultural University (ANGRAU), Government of Andhra Pradesh, Bapatla, India
2. Acharya NG Ranga Agricultural University (ANGRAU), Government of Andhra Pradesh, Hyderabad, India
3. Extension Education Institute, Prof. Jayashankar Telangana State Agricultural University (PJTSAU), Government of Telangana, Hyderabad, India
4. Department of Agricultural and Food Economics, University for Development Studies, Tamale, Ghana