CAMERON, J. .; PIERCE, W. . D. .; SO, S. . Rewards, Task Difficulty, and Intrinsic Motivation: A Test of Learned Industriousness Theory. Alberta Journal of Educational Research, [S. l.], v. 50, n. 3, 2004. DOI: 10.11575/ajer.v50i3.55091. Disponível em: https://journalhosting.ucalgary.ca/index.php/ajer/article/view/55091. Acesso em: 6 may. 2024.