Deliou, C. and Malagkoniari, M. 2023. The use of Cause and Effect Diagram (Fishbone) and its impact on Personal Quality Management: Case Study in a classroom during the pandemic of COVID – 19 . International Conference on Business and Economics - Hellenic Open University. 1, 1 (Jun. 2023). DOI:https://doi.org/10.12681/icbe-hou.5298.