1. Afrizal, M. (2015). Improving English speaking ability through classroom discussion. Lentera, 15(14), 1-9. https://doi.org/10.33603/rill.v2i3.2127
2. Akar, Ü. (2007). Öğretmen adaylarının bilimsel süreç becerileri ve eleştirel düşünme beceri düzeyleri arasındaki ilişki [The relationship between student teachers’ scientific proces skills and critical thinking skills] [Unpublished master’s thesis]. Kocatepe University.
3. Anwar, F.Z. (2015). Enhancing students’ speaking skill through Gallery Walk technique. Register Journal, 5(1), 253-568. https://doi.org/10.18326/rgt.v8i2.384
4. Arslan, R.Ş., & Yıldız, N. (2012). Enhancing critical thinking at the tertiary level through a literature based critical thinking program. Çukurova Üniversitesi Sosyal Bilimler Enstitüsü Dergisi, 21(2), 19-36. https://dergipark.org.tr/tr/pub/cusosbil/issue/4390/60352
5. Arter, J.A., & Salmon, J.R. (1987). Assessing higher order thinking skills. A consumer's guide. Oregon: Northwest Regional Educational Laboratory Test Center.