Sagala, Stephanie Ulyta Bena, et al. “Providing Snacks to Leek Farmer to Reduce Fatigue and Workload While Working on the Farm”. Jurnal BETA (Biosistem Dan Teknik Pertanian), vol. 10, no. 1, Apr. 2022, pp. 147-53, doi:10.24843/JBETA.2022.v10.i01.p15.