TYAGI, H. K.; GUPTA, A. Impact of Happiness Classes on the Students Studying in Schools of the Municipal Corporation, Delhi, India. JOURNAL OF TEACHER EDUCATION AND RESEARCH, [S. l.], v. 15, n. 01, p. 11–14, 2020. DOI: 10.36268/JTER/15103. Disponível em: https://www.jter.info/index.php/JTER/article/view/152. Acesso em: 6 mar. 2026.