gitea/templates/repo/cite/cite_buttons.tmpl

<button class="ui basic citation button" id="citation-copy-apa" data-text="">
APA
</button>
<button class="ui basic citation button" id="citation-copy-bibtex" data-text="">
BibTeX
</button>
<!-- the value will be updated by initCitationFileCopyContent, the code below is used to avoid UI flicking  -->
<input id="citation-copy-content" value="" size="1" readonly>
<button class="ui basic icon button" id="citation-clipboard-btn" data-tooltip-content="{{.locale.Tr "copy"}}" data-clipboard-text="" data-clipboard-target="#citation-copy-content">
	{{svg "octicon-copy"}}
</button>