Y. Hamed, Turfa. “Learing Visual Fox Pro Language With Audio, Video and Sharing”. AL-Rafidain Journal of Computer Sciences and Mathematics 4, no. 2 (December 3, 2007): 41–61. Accessed December 17, 2025. https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36672.