use CGI qw/Link/;

##</code><code>##

  print $q->start_html({
    -head=>Link({-rel=>'stylesheet', -type=>'text/css', -href=>'/foo.css'}),
  });

##</code><code>##

  print $q->start_html({
    -head=>Link([
      {-rel=>'stylesheet', -type=>'text/css', -href=>'/foo.css'},
      {-rel=>'stylesheet', -type=>'text/css', -href=>'/bar.css'},
    ]),
  });

##</code><code>##

  print $q->start_html({
      -head=>Link({-rel=>'stylesheet', -type=>'text/css', -href=>'/foo.css'})
        . Link({-rel=>'stylesheet', -type=>'text/css', -href=>'/bar.css'}),
    });