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Perrault، Evan K.؛ Albert، Cindy A. (4 أكتوبر 2017). "Utilizing project-based learning to increase sustainability attitudes among students". Applied Environmental Education & Communication. ج. 0 ع. 2: 96–105. DOI:10.1080/1533015x.2017.1366882. ISSN:1533-015X.
Strobel، Johannes؛ van Barneveld، Angela (24 مارس 2009). "When is PBL More Effective? A Meta-synthesis of Meta-analyses Comparing PBL to Conventional Classrooms". Interdisciplinary Journal of Problem-Based Learning. ج. 3 ع. 1. DOI:10.7771/1541-5015.1046.
Yasseri, Dar; Finley, Patrick M.; Mayfield, Blayne E.; Davis, David W.; Thompson, Penny; Vogler, Jane S. (1 Jun 2018). "The hard work of soft skills: augmenting the project-based learning experience with interdisciplinary teamwork". Instructional Science (بالإنجليزية). 46 (3): 457–488. DOI:10.1007/s11251-017-9438-9. ISSN:1573-1952.
Perrault، Evan K.؛ Albert، Cindy A. (4 أكتوبر 2017). "Utilizing project-based learning to increase sustainability attitudes among students". Applied Environmental Education & Communication. ج. 0 ع. 2: 96–105. DOI:10.1080/1533015x.2017.1366882. ISSN:1533-015X.