Sinurat, S. Y., N. Manalu, N. Simatupang, and I. Kasih. “Development of Volleyball Lower Passing Module Web Based on Junior High School Students”. Randwick International of Education and Linguistics Science Journal, Vol. 3, no. 4, Dec. 2022, pp. 655-67, doi:10.47175/rielsj.v3i4.609.