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                	    	<h1 class="title" id="page-title">Citation tools</h1>
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  <span class='highwire-cite-volume-issue'><span class="highwire-cite-volume">20</span>.<span class="highwire-cite-issue">10</span></span>
  <span class='highwire-cite-year'>(1999):</span>
  <span class='highwire-cite-pages'>1907-1914</span>.
  <span class='highwire-cite-year'>Web. 20 Sept2025.</span>
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