Ismail, Mohd Erfy, Mohd Ali Samsudin, Nor Fadila Mohd Amin, Nurzatulshima Kamarudin, Khairul Azhar Mat Daud, and Lilia Halim. 2018. “Contributing Factors to Science Achievement in TIMSS Malaysia: Direct Model and Indirect Model”. International Journal of Engineering & Technology 7 (4.30): 423-28. https://doi.org/10.14419/ijet.v7i4.30.22354.