Maulina, D., E. Andini, D. Tanri, N. Kamsanih, S. Mazaya, and T. Zhafirah. “Traffic Signs Comprehension Among Motorcyclists: The Effect of Sign Type and Sign Familiarity”. Humaniora, vol. 13, no. 1, Feb. 2022, pp. 81-90, doi:10.21512/humaniora.v13i1.7379.