Queiroz, Edileuza Dias, and Gabriel dos Santos Martins. 2018. “The Construction of Happiness in Volunteered Work in Environmental Education in the Municipal Natural Park of Nova Iguaçu-RJ ”. Revista Hipótese 4 (3): 57-71. https://revistahipotese.editoraiberoamericana.com/revista/article/view/348.