Wójciak, A. (2023) “Delta Questionnaire – adaptation of the instrument on a group of people with mild intellectual disability and a preliminary analysis of its psychometric properties”, Quarterly Journal Fides et Ratio, 55(3), pp. 185–192. Available at: https://fidesetratio.com.pl/ojs/index.php/FetR/article/view/1200 (Accessed: 10 August 2025).