ALI, Kais Deab; 						MOHAMMED, Wejdan Jasim; 						FADIL, Sahar Husain.
 Effectiveness of using the Keller Plan in the achievement of the first-grade students in the history subject.
<strong>Journal Of Al-Frahedis Arts</strong>, [S.l.], n. 31, p. 438 - 456, mar. 2019.
ISSN 2663-8118.
Available at: &lt;<a href="http://www.jaa.tu.edu.iq/index.php/art/article/view/60" target="_new">http://www.jaa.tu.edu.iq/index.php/art/article/view/60</a>&gt;. Date accessed: 29 nov. 2019.
doi: <a href="http://dx.doi.org/10.25130/art.v0i31.60">http://dx.doi.org/10.25130/art.v0i31.60</a>.