1.
Sanz Ponce R, Mula Benavent JM. Education in values program. Moral formation in secondary education students. Rev. Investig. UNAD [Internet]. 2013 Jun. 4 [cited 2026 Nov. 6];12(1):159-82. Available from: https://hemeroteca.unad.edu.co/index.php/revista-de-investigaciones-unad/article/view/1165