Abd Malek, N.; Osman, S. Z.; Ehsan, N. M.; Roslan, N.; Rosli, M. F. Design and Development of Mini Portable Cooler for Breastmilk Storage. IJET 2018, 7 (4.35), 569-572. https://doi.org/10.14419/ijet.v7i4.35.22912.