Rahayu, S., I. Ladamay, B. B. Wiyono, R. H. Susanti, and N. R. Purwito. “Electronics Student Worksheet Based on Higher Order Thinking Skills for Grade IV Elementary School”. International Journal of Elementary Education, vol. 5, no. 3, Aug. 2021, pp. 453-60, doi:10.23887/ijee.v5i3.36518.