Siti Norhafiza Mohd Khazaai; Nurul Aina Nasriqah Ma’arof; Nurul Hajar Embong; Mohd Hasbi Ab. Rahim; Gaanty Pragas Maniam. Mixed Domestic-Waste Catalysts for Methyl Ester Production of Soybean Oil. Maejo Int. J. Energ. Environ. Comm. or MIJEEC 2019, 1, 1-6.