मो. उमर. स्केल - पैमाना कितना बेगाना. प्राथमिक शिक्षक, [S. l.], v. 37, n. 1, p. p.12–19, 2025. Disponível em: https://ejournals.ncert.gov.in/index.php/pp/article/view/3281. Acesso em: 19 oct. 2025.