Mahmoud، A. S. (2012). The Impact Of Packages Production Processes On Package Ergonomics: Case Study Of Opening System Of Tetra Pack Milk Package. مجلة التصميم الدولية، مج1, ع2 ، 27 - 31. مسترجع من http://search.mandumah.com/Record/1021342
Mahmoud، Abeer Sayed. "The Impact Of Packages Production Processes On Package Ergonomics: Case Study Of Opening System Of Tetra Pack Milk Package." مجلة التصميم الدولية مج1, ع2 (2012): 27 - 31. مسترجع من http://search.mandumah.com/Record/1021342