Noel Kok Hwee Chia, E. Y. & A. G. T. N. (2010). An Analysis of Verb Pattern Errors in Active-Passive/Passive-Active Sentence Transformation in English made by Upper Primary Singaporean & Malaysian Chinese Children with Specific Language Impairment. Journal of the American Academy of Special Education Professionals, 5(2), 96-141. https://doi.org/10.64546/jaasep.108