Foydalanilgan adabiyotlar va manbalar: 1. Issues and trends in Education for Sustainable Development, A. Leicht, J.
Heiss and W. J. Byun (eds) 2018, UNESCO.
2. The future of education and skills Education 2030, OESD 2018.
3. https://thinkstrategicforschools.com/category/21st-century-education/