Shyam Nandan Mishra. “Assessing Secondary School Teachers’ 21st Century Attitude and Environmental Awareness for Promoting Education for Sustainable Development”. Vidhyayana - An International Multidisciplinary Peer-Reviewed E-Journal - ISSN 2454-8596 8, no. si6 (May 20, 2023): 661–669. Accessed May 9, 2025. http://www.j.vidhyayanaejournal.org/index.php/journal/article/view/773.