TRIJAYANTI, Nia; MATHILDA SUSANTI. Analysis of Instrument Quality Mathematical Representation Ability and Self-Confidence In Circle Learning. Pi: Mathematics Education Journal, [S. l.], v. 9, n. 2, p. 94–103, 2026. DOI: 10.21067/pmej.v9i2.13941. Disponível em: https://ejournal.unikama.ac.id/index.php/pmej/article/view/13941. Acesso em: 11 nov. 2026.