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Available at: &lt;<a href="https://publications.muet.edu.pk/index.php/muetrj/article/view/2292" target="_new">https://publications.muet.edu.pk/index.php/muetrj/article/view/2292</a>&gt;. Date accessed: 25 nov. 2024.
doi: <a href="http://dx.doi.org/10.22581/muet1982.2104.19">http://dx.doi.org/10.22581/muet1982.2104.19</a>.