Pradnyasuari, Ni Luh Ananda, et al. “Satisfaction Level of Vegetable Farmers in Using Hand Tractors in Candikuning Village, Baturiti, Tabanan, Bali”. Jurnal BETA (Biosistem Dan Teknik Pertanian), vol. 8, no. 2, Nov. 2019, pp. 364-72, doi:10.24843/JBETA.2020.v08.i02.p22.