1. Beyer, BK., (1995).Critical Thinking. Bloomington, IN: Phi Delta Kappa Educational Foundation.
2. Boswell, C. (2006). The art of questioning: Improving critical thinking. Annual Review of Nursing Education, 4, 291-296,298-299,301-XI.
3. Bratu, G. (2004). Applications of the Methods of Critical Thinking in Primary Education, Bucuresti: Humanitas Educational Publishing House.
4. Chereja F. (2004). Building Critical Thinking in Primary Education, Bucureşti: Educaţia 2000+ Publishing House.
5. Chorzempa, B.F., & Lapidus, L. (2009). To find yourself, think for yourself: Using Socratic discussions in inclusive classrooms. Teaching Exceptional Children, 41(3), 54-59.