Kurniawan, P. R., A. Kristiyanto, and S. Riyadi. “The Assessment Instrument Development in Physical Education Learning on Rhythm Gymnastics Materials for Upper Class Elementary School Students in Covid-19 Pandemic Era”. International Journal of Social Science Research and Review, Vol. 5, no. 12, Dec. 2022, pp. 13-21, doi:10.47814/ijssrr.v5i12.793.