CAMERON, Judy; PIERCE, W. David; SO, Sylvia. 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: 10.55016/ojs/ajer.v50i3.55091. Disponível em: https://journalhosting.ucalgary.ca/index.php/ajer/article/view/55091. Acesso em: 5 dec. 2025.