Mayura, A.A.G.A.S. et al. 2021. The Consumer’s Perception of the Eco-Friendly Crystal Guava (psidium guajava) Packaging Materials and Design. Jurnal BETA (Biosistem dan Teknik Pertanian). 9, 2 (Sep. 2021), 242–251. DOI:https://doi.org/10.24843/JBETA.2021.v09.i02.p11.