Daf Alla، A. B. A. K. A. (2009). Subject Matter of Copyright Protection; A Comparative study concerning European (With particular attention to UK) and Sudanese Law. مجلة العدل، س11, ع26 ، 408 - 436. مسترجع من http://search.mandumah.com/Record/640206
Daf Alla، Abo Bakr Al Khair Ahmed. "Subject Matter of Copyright Protection; A Comparative Study Concerning European (With Particular Attention to UK) and Sudanese Law." مجلة العدل س11, ع26 (2009): 408 - 436. مسترجع من http://search.mandumah.com/Record/640206