For example, put something like this in your theme’s custom.php file…
function my_custom_citation($item){
$publication = option('site_title');
$title = metadata($item,array('Dublin Core','Title')) ? metadata($item,array('Dublin Core','Title')) : null;
$source = metadata($item,array('Dublin Core','Source')) ? ' '.metadata($item,array('Dublin Core','Source')) : null;
$today = date("F j, Y");
$url = WEB_ROOT.'/items/show/'.$item->id;
$citation = $title.'. <em>'.($source ? $source : $publication).'</em>, accessed '.$today.', '.$url;
return $citation;
}
…then put this in your theme’s items/browse.php file.
my_custom_citation($item);