Handayani, P. H., G. N. Eza, and W. W. Sari. “Development of Interactive E-Modules in Science Learning Courses for Early Childhood: Training Students’ 21st Century Skills”. Journal of Natural Science and Integration, vol. 7, no. 2, Oct. 2024, pp. 204-13, doi:10.24014/jnsi.v7i2.28980.