Czupriniaki, Débora Regina, and Osvaldo Daniel dos Santos Pinheiro. “Need or Altruism: A Study about Ticketing and Staying in the Volunteering of the Child Cancer Institute”. International Journal of Advanced Engineering Research and Science 7, no. 3 (March 11, 2020). Accessed July 22, 2024. https://journal-repository.com/index.php/ijaers/article/view/1774.