Elsayed، K. A. (2022). Chi-Square Independence Test to Study the Effect of Chronic Diseases and Recovery from Covid 19: Case Study King Abdullah Hospital during the Period December 2020-June 2021. المجلة المصرية للدراسات التجارية، مج46, ع4 ، 1 - 28. مسترجع من http://search.mandumah.com/Record/1334293
Elsayed، Karema Ahmed. "Chi-Square Independence Test to Study the Effect of Chronic Diseases and Recovery From Covid 19: Case Study King Abdullah Hospital During the Period December 2020-June 2021." المجلة المصرية للدراسات التجارية مج46, ع4 (2022): 1 - 28. مسترجع من http://search.mandumah.com/Record/1334293