The effectiveness of systemic thinking skills to master the skill performance in drawing perspective for second-grade intermediate students. Journal of the College of Basic Education, [S. l.], v. 28, n. 114, p. 393–410, 2022. DOI: 10.35950/cbej.v28i114.5425. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/5425.. Acesso em: 3 jul. 2024.