ABDULRAHMAN AL – TIKRITI, Harith; 						HAMID KHALAF, Moataz.
 Second International Association of Workers 1889-1914 (Study on the causes of emergence and collapse)..
<strong>Journal of Tikrit university for humanities - مجلة جامعة تكريت للعلوم الانسانية</strong>, [S.l.], v. 25, n. 5, p. 312-350, apr. 2019.
ISSN 1817-6798. Available at: &lt;<a href="http://jtuh.tu.edu.iq/index.php/hum/article/view/529" target="_new">http://jtuh.tu.edu.iq/index.php/hum/article/view/529</a>&gt;. Date accessed: 17 may 2024.
doi: <a href="http://dx.doi.org/10.25130/hum.v25i5.529">http://dx.doi.org/10.25130/hum.v25i5.529</a>.