The formal system and its relationship to functional performance in the design of the home sewing machine. Journal of the College of Basic Education, [S. l.], v. 19, n. 77, p. 501–528, 2022. DOI: 10.35950/cbej.v19i77.7577. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/7577.. Acesso em: 17 jul. 2024.