Engel، N. P. (1975). 25 Years Human Rights At The Council Of Europe: Is Unemployment A Violation Of Human Rights : Can The Right To Work Be Made Enforceable By Law. المجلة المصرية للقانون الدولي، مج31 ، 183 - 185. مسترجع من http://search.mandumah.com/Record/679665
Engel، Norbert Paul. "25 Years Human Rights At The Council Of Europe: Is Unemployment A Violation Of Human Rights : Can The Right To Work Be Made Enforceable By Law." المجلة المصرية للقانون الدولي مج31 (1975): 183 - 185. مسترجع من http://search.mandumah.com/Record/679665