Güngör Seyhan, Hatice. “The Investigation of the Perception of Problem Solving Skills by Pre- Service Science Teachers in the Science Laboratory”. International Journal of Physics & Chemistry Education 6, no. 2 (August 15, 2014): 142–161. Accessed May 22, 2022. https://www.ijpce.org/index.php/IJPCE/article/view/62.