Akbar, S. and Yudhana, A. 2016. PROTOTYPE OF TUBE OF LIQUID FERTILIZER BASED QUADCOPTER RIDES FOR RICE LAND PAD. Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering). 3, 2 (Oct. 2016), 26-30. DOI:https://doi.org/10.33019/ecotipe.v3i2.22.