Norkhaidi, S. B., H. Mahat, M. Hashim, N. Nayan, and Y. Saleh. “Elemen Pengetahuan Literasi Karbon Dalam Kalangan Pelajar Sekolah Menengah: Pendekatan Analisis Pengesahan Faktor (CFA): Carbon Literacy Knowledge Element Among Secondary School Student: Confirmatory Factor Analysis Approach (CFA)”. GEOGRAFI, vol. 5, no. 1, Apr. 2017, pp. 1-11, https://ejournal.upsi.edu.my/index.php/GEOG/article/view/2022.