L. Bee Fang and L. Hooi Lian, “Kesan Penggunaan Strategi Metafora Dalam Pembelajaran Algebra Dalam Kalangan Pelajar Menengah Rendah: Effects of the Metaphor in Algebra Learning Among Students in Lower Secondary”, JPSMM, vol. 5, no. 2, pp. 51–70, Oct. 2015.