SILFANAH, Kofifah; 						SARTIKA, Septi Budi.
 The Validity of Question Items on The Material of Animal and Plant Reproduction in 9th Grade Secondary School.
<strong>Proceeding International Conference on Lesson Study</strong>, [S.l.], v. 1, n. 1, p. 75-83, oct. 2023.
ISSN 3030-9115.
Available at: &lt;<a href="https://journal.umg.ac.id/index.php/icls/article/view/6519" target="_new">https://journal.umg.ac.id/index.php/icls/article/view/6519</a>&gt;. Date accessed: 22 july 2024.
doi: <a href="http://dx.doi.org/10.30587/icls.v1i1.6519">http://dx.doi.org/10.30587/icls.v1i1.6519</a>.