Abdulrahman Al – Tikriti, Harith, AND 		Hamid Khalaf, Moataz.
" Second International Association of Workers 1889-1914 (Study on the causes of emergence and collapse)." <em>Journal of Tikrit university for humanities - مجلة جامعة تكريت للعلوم الانسانية</em> [Online], Volume 25 Number 5 (12 April 2019)