Goncalves, Miguel M., and Joao Salgado. “ Psychology and the Nature of Empirical Research”. Studia Psychologica: Theoria et praxis, no. 6 (August 22, 2006): 171–188. Accessed November 22, 2024. https://czasopisma.uksw.edu.pl/index.php/sp/article/view/2626.