Murafer Y, Safkaur TL, Kocu EMJ, Yumame J, Sinaga M. Effectiveness Of Collaborative Class Program For Civil Servants Toward Sustainable Development Goals. IJESSS [Internet]. 2026 Sep. 30 [cited 2026 Oct. 25];7(5):1276-8. Available from: https://journalkeberlanjutan.com/index.php/ijesss/article/view/2051